by Iwantkevhammer August 2, 2018

When a female grabs the shaft of an erect penis, then using her other hand makes a fist and a hammer motion, smashing the head of the penis.
So jake pissed a girl off again last night, and during what he believed was his victory blowjob for winning the argument he was brought to the fetal position with a brutal mushroom hammer.
by Francis the fantastic May 20, 2014

by Maccamore February 14, 2021

Heel Hammer - Scoot to the end of your chair and let the "boys" spill of the edge. Now raise either foot (or both) and give the giggle berries a good whack.
by d3m0@IDMF May 11, 2009

by SweetJC6464 February 6, 2014

To masturbate violently.
by Flyingwallruss November 11, 2017

when there's not full access to a penis and so a full grip of the hand cannot be obtained such as in the cinema when your dicks inevitably through the bottom of the popcorn box, so the index and middle finger become like the claw of a hammer and the penis being like the nail that's being pulled giving a better grip
by Mattc96 February 25, 2015
