Lmk
Lmk means “let me know”
Usually used in text message instead of in person.
Hey lmk about what happened later
lmk means let me know. It is also an app mainly used for Snap Chat. People will say this when they want you to tell them something.
Person 1: okay just lmk when you find out the news
Person 2: yeah you'll be the first to know
Let me know
Pretty much speaks for itself
Alr so we'll meet up later
Yeah lmk
Lmk is the definition for "Lag my kla" if translated in English, it translates to "Laugh me finished" which is similar to laughing themselves dead(figuratively).
Lmk James is getting detention because he fought.
The principal phoned Nina's mother lmk.
Alex give Terry a blue eye lmk.
It simply means "let me know." Or get back to me with answer.
If it already formally exists, I don't know, but I started using it in my e-mails in the '90s for convenience. Today, someone responded "OH!!!!!!" after I replied to his "what's the meaning of that" e-mail. So, there you have it.
In e-mail commonly, consider for example:
1) If you need anything, LMK.
2) What're you guys doing tonight? LMK.