I used to just vaguely guess the meaning of it and move on with the conversation with them.

Finally today i checked up those acronyms on the www.urbandictionary.com for their exact meanings.

ttyl: talk to you later

lmao: laughing my ass off

roflmao: rolling over floor laughing my ass off (i only knew rofl)

lolz: laugh out loud, zebras (wonders why there are zebras)

I know i sucks, but am I the only one that does not know all this acronyms?