1. Same as saying "don't shit where you eat"
2. Meat meaning "meat injection" and "bread and butter" meaning money.
3. It's not a good idea to sleep with the same people you work with.
Co worker: have you noticed Bam's got nice buns
Me: Don't get your meat where you get your bread and butter
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).