Used as an insult, it can mean either one who is full of hot air; (e.g. queef air). Also can be used to denote a total asshole
"hey, get your head out of your ass, you queef bucket!"
When pounding her fart box you cum in her then pull out, and shit and cum run out of her fart box. (Boston cream donut)
I was pounding my girl doggy style the other night and gave her a Boston cream donut!