All the other people suck. It means your mother is a hooker...seriously...not hard. Thats what it means. Not stupid or an arsehole...just that yo mamma is on the game. People use it when somone is a cunt, like most swear words..but thats not what most of them mean.
"Man, applemartin, thats one fucked up name, and I heard yo mammas a right git?"
"Fucking right man, have you seen Vanilla sky?"
"You are a git, yes you, the one reading this, you may not know, but yo mamma is not where you think she is, shes in my friend's bed..."
v. A redneck adaptation for the word "get." Used as an informal way of wanting to leave when one is drunk, high, or stupid. Not in any way to be confused with the word "get" you idiot.
Maranda: Let's git the hell out of El Chico's, I have the spicy sh**s.