Top definition
When instead of jacking off in the toilet or in your room you jack off in the tub but ass naked
Garrett was jacking off in the tub and his sister Alex walks in and asks Garrett what are you doing? He simply says I'm taking a shit but really he was "bathsterbating"
by Garrett6969 January 22, 2014
Get the mug
Get a bathsterbating mug for your bunkmate Bob.