Pointless post, but I didn't know until the other day that the expression is actually "champing at the bit", instead of chomping. Comes from horses champing at their bits, eager to get about. Funny thing is, to champ is to bite, which is exactly what chomping is. Makes more sense for the phrase to be chomping, but no, it's champing. And no, I don't know what a bit actually is. A mouthpiece, I'd imagine. But yeah, there's your daily dose of useless information lol.