Sperm whack 

To hit an ejaculating penis upon an object or person. Usually done by a man upon a woman.

Steve sperm whacked Donna.

Terri was sperm whacking Lisa with Roger's pud.

Sperm whack by Caesar Anonymous IV November 20, 2010

mental whack picture 

a mental snapshot that a man takes of a woman or certain parts of a woman he sees in public so that he can jerk off to the image later.

It would have been too obvious for Dusty to take an actual photo of the hot woman he saw with his cell phone, so he settled for a mental whack picture.

mental whack picture by ducksRpeople2 September 11, 2011

poon whack 

The extremist maneuver a female can do, it starts with a vaginal first dive off of a roof (over one story high) onto a trampoline then bounce off do a front flip and land on the male's penis with absolute finesse, blindfolded.

"Did you here that Jack and his girlfriend did a poon whack on their anniversary."

poon whack by Nickofwiseman December 17, 2015

within whack 

within whack (wyth-IN WACK)(adj pr): In order, within specifications, nominal --"lost positive" phrase opposite of "out of whack."

"This engine was way out of whack, but after repairs, it's well 'within whack' now."

within whack by The_Real_Terry September 13, 2020

midnight snack-whack 

Jerking off in the middle of the night.

Man 1; jeez you look tired.
Man 2; I know, I had a midnight snack-whack while my folks were asleep.

midnight snack-whack by Crashy873 October 4, 2016

watch and whack 

When one a man watches a guy and a girl having sexual relations while jerking himself off.

Mike did the watch and whack as Jess gave Dave road head.

watch and whack by BlairH April 14, 2008

Power Whack

A masturbation session lasting no more than 5 minutes.

1. I was in a hurry for class at 9, so I had to have a power whack at 8:50.

2. Dude 1: Hey I'm gonna go take a power whack.

Dude 2: Don't mean power nap?

Dude 1: No, a power whack.

Power Whack by Beardmon July 3, 2010