gnar jar 

A banging headache usually achieved by hitting your head on the floor during an extream sport.

Holy shit dude I've had the worst gnar jar every since I ate shit on that front side lip slide on the 10 set.

gnar jar by iDa Guzman of bexley June 28, 2011

gnar jar 

a gay trick or another word for bop

one day at the skate park kyle says tht girl is a bop then i say im gonna make a another word for it so i use the gay trick gnar jar to call them tht

gnar jar by joe mulqueen August 9, 2006