Used as a "manly" come back to someone who is either being challenged or it can be offered as a direct challenge to another;
"Show me what you got!"
"Do your worst"
"Bring your shit!"
"Go for it!"
Basketball Player 1: "Im gonna slam dunk yo punk ass."
Basketball Player 2: "Ahhhight, bring it bitch. Let's see what you got!"
Another way of saying bring it on. It is a invitation to make someone perform a action.
Watch me destroy you!
for one to invite you to come forth
bring it bitch
Kick ass player of rvs, with many adoring fans. Is not a "fudge packer" and will and can not get fooled by anyone (again).
Bringit: Arg, I'm the best!
Groinshot: I agree! Don't hurt me!
Bringit: ha ha ha, kiss my shoes!!
Groinshot: ok ok ok
Diablo: ha ha my names martin, and i thought i could fool Bringit but i was so so wrong!
Expression used by losers these days, especially Gen-Y, who thing they're so cool and often wear Usher style sunglasses.
Loser A: "I think I'm so cool, I should eat my own shit"
Loser B: "Bring it!"