Text language for the largely used phrase, "Way To Be That Guy
The phrase is used to describe a moment where someone almost/completely ruins the mood of a moment in an attempt to appear to be "the cool guy."
Person 1: Hey, do you want to come to my apartment and...
Random Dude: Yeah!!! Fist pumpin' like champs, what now?!?!
Person 1: Wow, dude. Way to be that guy (wtbtg).