My bad

[Rihanna]

A way of admitting a mistake, and apologizing for that mistake, without actually apologizing. The best definition I ever read of this, now paraphrased:
I did something bad, and I recognize that I did something bad, but there is nothing that can be done for it now, and there is technically no reason to apologize for that error, so lets just assume that I wont do it again, get over it, and move on with our lives.
Ruder than apologizing, but with the same meaning: a flippant apology.

[Tanya Shivari]

(n.) A combination of an apology and a dismissal. Basically, saying oh yeah, I did that, but I dont care.
Persons of an older generation can find this quite annoying to hear when expecting an actual apology.

[Tanya Shivari]

A grammatically incorrect way of acknowledging (facetiously) a wrongdoing.
Used very commonly by gangsta-wannabes and other sorts of conforming posers, the terrible grammar tends to drive literate people up the wall in absolute irritation.

[Britney]

A term currently used when a mistake is made on your part. Allegedly originating from an unamed African Basketball Player in the 1980s (who spoke very poor english)who said it after missing a free throw. Several Sportscasters heard the phrase and used it as a joke until it became a part of popular culture.

[Sonia]

A hipster way of admitting a mistake that sounds like a two year old who pooped his pants.

[Mark Zuckerberg]

Incredibly annoying phrase which people use when they do something stupid or wrong

[Couch Potatoe]

A way of appologizing when you dont reallly care about the situation. Kind of like saying whatever.

[Sarah]

Something very annoying commonly said after one makes a mistake.