The act of getting fellatio in a pool, and after reaching climax drowning your girlfriend. You then call for the lifeguard to give her mouth to mouth resuscitation, and eventually, she will cough up the ejaculate into the lifeguard's mouth. He will then be pretty angry.
Jim: Yo dude! You see that lifeguard puking up semen!
Sean: Yeah man, he must have gotten the old angry lifeguard.