Being a to take two cocks in one mouth with a smile.
Whoa! Kai is such a bumsoil, he on took Kerry and George with no remorse last night!
The act of being able to take two penises in one's rectum at one time, with a smile. Named in honor of its esteemed founder, "Bumsoil", of the ever growing homosexual pornography business.
John, new to the business, was eager to start his career in the gay porn business, so he pulled a "bumsoil" in his first ever video and instantly won the respect of his peers.