person which can be described as very annoying, obnoxious in their habits but also somewhat arrogant, rude and narcisistic. The word is a combination of "Prick" and "brat"
Ron: Shit, dude. When Dave came over telling me how cool his record collection was and that mine was shite
, and what not, I was ready to smack his ass.
Alex: Yeah, he's a prack.