Those are "text lingo" or "text slang" and if you look up either, lists should show up with their respective meanings! But if you wanted to know some off the bat:
Lmao- laughing my ass off
Lol- laugh out loud
Lmfao- laughing my fucking ass off
Oml- oh my lord
Omg- oh my gosh/god
Gtfo- get the fuck out
Gtg- got to go or alternatively, "gotta go"
Brb- be right back
Gg- good game (used for gamers, athletes, etc)
Af- as fuck
Most of these are almost always used sarcastically unless in caps
Idk-i don't know
Idc-i don't care
Plzpls- please
Imao-i in my arrogant opinion
Lmao-laughing my assistenza off
Lol-laughing out loud
For others here is the link
https://www.internetslang.com/trending.asp (⌒▽⌒)
Here are some more:
Atm- at the moment
Afk- away from keyboard (used by gamers)
Stfu- shut the fuck up
Asap- as soon as possible
Kys- kill yourself
Ty- thank you
Yw- your welcome
Np- no problem
Tysm- thank you so much
Idk- I don't know
Omg- oh my god
And some times at very rare occasion Lol can also mean "Lots of love" (it rarely happens tho)
So I want to know what BTW or wtf and those kinds of thngs mean...
Well I know what this two means wtf - what the fuck.. BTW - by the way... right?
And I was wandering what others are and what they mean???
Sorry for bad English...