Buck Tooth monkey is a facial expression, hold out your ears, puff out your cheeks, buck out your teeth and make a double chin. Congrats! You just made the UGLIEST face EVER
A Buck Tooth Goof is the act of anal sex, with another male, in a wooded area after a night of drinking. It's called the Buck Tooth Goof because the perpetrator will yuk yuk like Goofy from the cartoons.
A shorthand term to describe a person that has teeth that jut a good few centimeters in front of their nose.
... Holy Shit That guys a Buck Tooth Betty! He could open several cans of beetroot with those chompers, heh, he'd give a beaver a hard time, I'd put my money on Betty there, good stock running in that family, good stock.