Simply means yeabitch, but is so commonly combined into one word that is has become commonplace slang. Commonly used by girls with their friends, and boyfriends with girlfriends in a non-offensive way.
Girl: Will you take me out to the movies friday and we can go to the party?
Guy: Yeabitch, told you I would already.
Guy: Yeabitch, told you I would already.
by Isar January 19, 2006