The hand warmer 

When a guy is going at with a girl from behind and holding her arms back and just before he finishes he pulls out and fills her hand.

Hey babe you look cold, did you need the hand warmer?

The hand warmer by Thevibzer July 28, 2016

Shaking the hand warmer 

ANOTHER term for beatin' the meat. When you get out a hand warmer, you normally shake it real hard so it will warm up faster. Kind of same emphasis with the meat part.

John: Oh my god, Alex, your face is so red! And you're out of breath! And there's a stain on the carpet! What did you DO!?

Alex: Oh, you know. I was just shaking the hand warmer.

Shaking the hand warmer by Diesektd Frawg May 1, 2009