"Wreckhead" is a term used to describe someone whos brain is either wrecked, or someone has said something thats wrecked your head.
Man 1: i had sex with my sister last night
Man 2: haha shut up ya Wreckhead
Shut Up Ya Wreckhead
Someone who is soft, as in they cant fight.
some guy comes upto you in the street acting all ghetto, like hes about to beat you up. you say: come on then lets fight, and he backs down and runs away. hes a muppet