Workplace messaging has changed. Chat tools like Slack and Microsoft Teams made office communication faster and more informal, and many people now type to coworkers the way they text friends. That raises a fair question: is “lol” unprofessional? Is a thumbs-up emoji a polite reply or a brush-off?
There is no single rule, because workplaces differ. But there are reliable patterns. The right choice depends on three things: the channel, the person, and the stakes of the message.
This post walks through each one, with a rewrite table and a quick checklist you can use before you hit send. If you need a refresher on what a term means, our text slang guide has the full glossary.
Know Your Channel
Different tools carry different expectations. A message that is perfectly normal in a team chat can look careless in an email.
| Channel | Typical tone | Slang and emoji |
|---|---|---|
| Team chat (Slack, Teams) with close coworkers | Casual, quick | Light use is usually fine |
| Public or company-wide channels | Semi-formal | Keep it minimal |
| Internal email | Professional but friendly | Standard abbreviations only (FYI, ETA) |
| External email to clients or vendors | Professional | Avoid slang and most emoji |
| Text messages with a manager | Depends on your relationship | Mirror their style |
Chat apps
Chat is the most forgiving space. Emoji reactions are built into the tools for a reason: a quick ✅ or 👀 can acknowledge a message without adding clutter. Abbreviations like FYI, EOD (end of day), and OOO (out of office) are standard workplace shorthand and rarely cause confusion.
Newer slang is a different story. “NGL this deck is mid” might be fine between two teammates who joke around, but posted in a channel with 40 people, it can read as dismissive of someone’s work.
Email lasts longer, gets forwarded, and is often read by people you didn’t expect. Treat it as a written record. Use full sentences, standard capitalization, and normal punctuation. For guidance on commas, periods, and dashes, see our punctuation guide.
Quick rule: The more permanent and public the channel, the less slang it can handle.
Writing to Clients and Customers
With clients, clarity and trust come first. Even abbreviations you consider universal may not be. A client who reads English as a second language, or who simply isn’t online much, may not know what “TBH” or “IYKYK” means. Slang also shifts the relationship toward casual faster than some clients want.
A good default with anyone outside your organization:
- Write in complete sentences.
- Spell out abbreviations, except very common business ones (ASAP, FYI) once the relationship is established.
- Skip slang entirely.
- Use emoji only if the client uses them first, and keep them simple (🙂 or 👍 rather than 💀).
If a long-term client writes “lol” and sends emoji, matching their tone in moderation is usually fine. Let them set the level.
Writing to Managers and Leadership
Your relationship with your manager matters more than any general rule. Some managers chat in emoji and memes; others write two-line emails with a formal sign-off. Watch how they write to you and to the team, then stay one notch more formal than they are until you know them well.
Be especially careful with messages that carry weight:
- Reporting a problem or a missed deadline
- Asking for time off, a raise, or feedback
- Disagreeing with a decision
In these moments, “lol” can look like you aren’t taking the issue seriously. “I missed the deadline lol” lands very differently from “I missed the deadline. Here’s my plan to catch up.”
Texting Across Generations
Many workplaces now include several generations, and each may read the same message differently. These are tendencies, not rules, but they explain a lot of misunderstandings.
The thumbs-up
To many people, 👍 simply means “got it.” Some younger readers, though, see a lone thumbs-up as curt or passive-aggressive. If you suspect the other person reads it that way, a short word works better: “Sounds good!” or “Thanks, will do.”
The period
In a one-line chat message, a final period can feel cold to some readers. “Ok.” can seem annoyed, while “ok!” or “Sounds good” seems friendly. In longer messages, periods are normal and expected.
Emoji with double meanings
💀 often means “that’s hilarious,” not anything grim. 😭 can mean overwhelmed by something funny or sweet. Someone unfamiliar with those uses may be confused or even worried. When the audience is mixed, choose emoji with clear meanings, or skip them.
Quick rule: If a message could be misread by someone older or younger than you, use words instead of a symbol.
Rewriting Casual Messages Professionally
Translating slang into professional language is usually simple. Keep the meaning, drop the shorthand, and add a clear next step if one is needed.
| Casual version | Professional version |
|---|---|
| “ngl the report needs work” | “I think the report needs another round of edits. Happy to help.” |
| “idk, will check” | “I’m not sure yet. I’ll check and get back to you today.” |
| “omw, running late lol” | “I’m on my way and running about 10 minutes late. Sorry about that.” |
| “bet” | “Sounds good, I’ll take care of it.” |
| “tbh I don’t love this idea” | “I have a few concerns about this approach. Could we discuss?” |
| “smh the link is broken again” | “The link appears to be broken again. Could someone take a look?” |
| “lowkey swamped rn” | “I’m at capacity today. Could this wait until tomorrow?” |
| “k” | “Okay, thanks for letting me know.” |
| “This is fire 🔥” | “This looks great. Nice work.” |
| “nvm figured it out” | “Never mind, I found the answer. Thanks!” |
Notice that the professional versions aren’t stiff. They are just complete. Clear writing still has room for warmth, and an exclamation point in “Thanks!” is perfectly professional.
Word choice matters too. Slang isn’t the only thing that can trip you up; mixing up words like affect and effect can undercut a polished message. Our post on affect vs. effect covers that one.
A Simple Decision Checklist
Before you send a message with slang or emoji, run through these questions. If you answer “no” to any of them, rewrite in plain English.
- Does the reader use this kind of language with me? Mirror them rather than lead.
- Will they understand it instantly? No decoding required.
- Is the topic low stakes? Bad news, feedback, and requests deserve full sentences.
- Is the channel informal and private? A one-on-one chat, not a company-wide post or a client email.
- Would I be comfortable if this were forwarded? Assume screenshots happen.
- Is it free of profanity? Abbreviations like WTF still count as swearing.
GrammarVista.com USA recommends one more habit: reread any message to a client or manager once before sending. Most tone problems are obvious on a second look.
The Bottom Line
Text slang isn’t wrong at work, but it’s a tool with a narrow range. Light abbreviations and simple emoji reactions are usually fine in team chat with people you know. With clients, managers you don’t know well, and anything important, plain English wins. When in doubt, mirror the other person, choose words over symbols, and write the message you would be comfortable seeing forwarded.