What is Uncoolio?
A name for someone who uses so-called "ghetto" words, thinking it makes them cool, but really they just look/sound like a complete idiot.
Dude1: Yo, wasSAAAP in the hizzle my nizzle fo shizzle rizzle eeny meeny miney mo-mizzle!?!? ..Word.
Dude2: Just shut up, Uncoolio.