Amazon Firefighter
When a man is having sex with a woman, pulls out just before ejaculating, lights her pubic hair on fire with a match, and cums on it to put it out.

Spin
The act of impaling a short woman on the spindle of a taller man, a synonym for sexual intercourse.

Walrus
A slang term for when a guy cums in a girls mouth, and then punches her in the stomach. Before she has a chance to swallow, it comes out her nose and looks like a set of walrus tusks.

Eskimo Sisters
A slang term describing two women who discover they have had sex with the same man.

Phimosis
A condition in which the foreskin is so tight against the glans that it cannot be pulled back and must be loosened or removed surgically.