look up any word, like blumpkin:
 
1.
when you accidentally do something wrong and then apologize for your mistake
Marius:Nigga you ate all my food

Fat Man: My fault(continues eating)

Marius:Nigga please
by Roughdogs233 July 22, 2008
 
2.
A way of replacing the need to apologize or to say sorry, often by using this term to ease the tension of the situation. To make one seem not as responsible of his or her mistakes. my bad can also be an alternative term of equal meaning.
1: I had sex with your girlfriend last night.
2: What the hell?? What kind of friend are you???
1: Aw man, my fault! (or "my bad!")
2: Man it's cool, since you said my fault.
by zculver August 04, 2008