LMK
What does LMK mean?
LMK is an abbreviation for let me know.
LMK used in a sentence
“LMK when you're on the way.”
This example shows the term in context rather than treating the definition as a literal word-for-word substitution. Slang often depends on tone, audience, and the conversation around it.
How do you use LMK?
LMK asks for an update, decision, answer, or confirmation. It is casual but widely acceptable in everyday work messages too.
Where did LMK come from?
The abbreviation became common through texting, email, and instant messaging as a compact request for information.
Common variations of LMK
let me know
The full phrase.
lmk asap
A request for a quick update.
lmk either way
A request for confirmation regardless of the decision.
LMK: frequently asked questions
What does LMK mean?
Let me know.
Is LMK professional?
It is fine in casual workplace communication, but writing it out is more formal.
Does LMK require a reply?
Usually yes, once the requested information is available.