1 definition by Tyred
Named after the Thompson sub-machine gun, it's a slang term used to describe someone masturbating until the ejaculation of blood. Can be used as a noun or verb.
1.In sixth grade, Mr. Young convinced Tom to pull a tommy gun.
2.The next day, Tom couldn't skate because he was too busy tommy gunning.
2.The next day, Tom couldn't skate because he was too busy tommy gunning.
by Tyred December 19, 2005