Definitions by Mr. Man of Sri Lanka

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.

Whitewash Tuba by Mr. Man of Sri Lanka October 6, 2012