Whitewash Tuba
When a male ejaculates into the mouth of an obese female with enough force to cause her to expel flatus.
Dude 1:Dude, have you ever smelled fart and cum at the same time?
Dude 2: Yeah, one time I gave this girl a Whitewash Tuba.
Dude 2: Yeah, one time I gave this girl a Whitewash Tuba.