Someone who is the result of 16 generations of inbreeding therefor lacks any form of intelligence, self awareness and Behaves in hot-headed and impulsive way.
Usually also sociopathic.
That guy just hit his teacher because he didnt pass his test, He's Basten Brained
Slang term coined by Ian Carter, meaning "Hey cunt, bring your fat snatch over here and wipe it on the floor, wipe up the puddle of seminal fluids, cunt"