Worrying oneself into a fret over exams in such a way that one goes completely insane over them.
"I would hang out with Fred, but his examga is really freaking me out."
Adjective: Being of a disagreeable state. Not being friendly. Acting like chewbacca would.
1. "Hey can I have some chips?"
"Cmon man, don't be chewbacca to me."
2. "Is it just me or is Fred dumber today?"
"Nah, I think he lost a bet and has to act chewbacca"