10 English Acronyms to know in 2025

An acronym uses the first letters of a phrase to create a short form. Acronyms are used in common language, especially in texting speak or on messaging services. Get started on your English learning journey by learning more about the most common acronyms and how to use them below!

1. IMO – in my opinion

Used to express personal opinions rather than objective facts. Mainly used in text conversations and social media or other online platforms.

Ex. “IMO, the first book was better than the sequel.”

2. FYI – for your information

Used to send someone a message with information that you think they should see, or mention something that you think they should know.

Ex. “FYI, I made the reservation for Friday.”

3. BRB – be right back

Use this phrase when you have to leave the conversation for a short break but want to return when you are back.

Ex. “I have to take a call, BRB.”

4. IDK – I don’t know

Let whoever you are texting know that you don’t have the answer by telling them, ‘IDK’.

Ex. “IDK who she is.”

5. JK – just kidding

We know that sometimes it can be hard to communicate well over text, you can say ‘just kidding’ if you want to clarify that what you were saying was a joke.

Ex. “I’m not excited for dinner tonight… JK!”

6. SMH – shaking my head

Much like a normal headshake, this one is used to express disapproval or frustration. It’s often used in a light-hearted/humorous way on the internet.

Ex. “SMH, I’ve been waiting in this line for 2 hours!”

7. AMA – ask me anything

Used by individuals or experts to invite people to ask them questions on any topic. Popular on online discussion platforms like Reddit.

Ex. “AMA about the new IT system we’re implementing.”

8. TL;DR – too long; didn’t read

This acronym is either used to express that a piece of written content (social media post, blog, message, document, etc.) is too long. Or, it is used before sharing a summary of lengthy content for quick understanding.

Ex. “TL;DR: Great battery life, but the camera isn’t as good as expected.”

Ex. “Can you send a TL;DR version of this article?”

9. OFC – of course

Let your friend or an acquaintance know that what they said or what you have said is expected or obvious.

Ex. “OFC I can pick you up later.”

10. LMK – let me know

When you need someone to give you a response, make sure to ask them to give you an answer later.

Ex. “If you need help with your assignment just LMK.”

Try out these acronyms for yourself! If you want to learn more,

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