mensterbating

It's when a women masterbates while menstruating.

"What's her problem, is she just weird, or is she mensterbating."

by Dr Delta SP. Oz October 26, 2013

Monsterbation

Where you jerk off under someone's bed to scare them. Upon finishing, you shout "HAPPY HALLOWEEN" in your scariest voice.

"Hey, Jimmy, what did you get up to for Halloween. Costume party?"
"No, I just went on a monsterbation spree. Scared the little bastards senseless. It was both a trick and a treat."
"This friendship is over."

by Bruno Strongarm April 23, 2014

Mansterbation

1. Male form of masterbation
2. Jerking off
3. Whacking off
4. Beating it
5. Jacking off

Our police records show that you were arrested yesterday for public mansterbation.

by osiz February 8, 2010