Acronym for I Quit This Bitch. Most often used for an all around expression of frustration and quitting of a certain situation and or person.
1. Dude: Man, this chick is whack. IQTB
2. Chick: The stupid candy machine doesn't work. IQTB
stands for I Quit This Bitch
check out www.youtube.com/watch?v=zoqJx5zQb6w
your boss says somethin mad stoopid over IM and you reply IQTB