The best way to converse with my 15 year old is often via text...and yet half the time I have to ask "what does that mean".
So here's some of the latest in text/chat slang according to my teen:
Plox = Please
KK = OK
Dipping = to leave
Gucci = Good
Sometimes things that are old are new again. "Lit" means a party has beer or weed. When I was a kid, "lit" meant you were high.
Swerve = Reject
And in case you were going to use On Fleek, forget it. Now Snatched is the new On Point (best used with girls)
Boots = I don't know, it's sort of an exclamation at the end of a sentence. as in "I'm exhausted. Boots" means you are really wiped out.
And last, in case you haven't escaped 2015, you should know Ship. Meaning a couple you really want to get together. At this stage in my life, I really couldn't give a Ship about any other couples, but for tweens/teens, apparently it means everything.