Alligator Slap 

The act of slapping someone in the face with one's penis. Both a noun and a verb.

I woke her up with an alligator slap.

Alligator Slap by poorliljeffy June 5, 2010

Alligator Slap 

An open-handed alternative to the Donkey Punch.

If administered properly, the Alligator Slap has the same anus-tightening effect as the Donkey Punch, but allows the sexual partner to remain conscious during ejaculation.

I wanted to see the look in my girlfriends eyes, so I gave her the Alligator Slap instead of the Donkey Punch.

Alligator Slap by Rewot Krad November 7, 2008