Sexual act - The tommy gunner kneels between the legs of the target and makes a gun shape with both hands using the first two fingers as the barrel. Placing the hands at chest height with your elbows out, proceed to rapidly insert and exit the vagina (or any other orifice) with the fingers. It helps if you say "rat-tat-tat".
A variation of this move called the Extended Clip is to also place the pinky fingers out and use these fingers to enter the rectum simultaneous to the pointer and middle fingers entering the vagina. Again it helps to say "rat-tat-tat" at some point.
Denny was going down on me and all of the sudden he started tommy gunning me!
I think Denny invented tommy gunning cause hes so damn good at it!
by FatKidsFall December 23, 2013
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Nickname for the Thompson submachine gun - an automatic firearm with a distinctive drum magazine and verical foregrip.

The Tommy gun is best known for being the weapon of choice of Prohibition-era gangsters, but it was also used extensively during WWII.
Jimmy the Finger got a mouthful of lead from a Tommy gun.

Back in the war, my granddad used his Tommy gun in the trenches of Normandy.
by Tronno May 4, 2005
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A fatass white kid that throws fucking heat
This pitcher is scary, he’s a tommy gun
by ZO2 August 21, 2017
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A pint of beer with three olives and a splash of grinadine. Usually consumed at strip clubs. The olives start dancing like a lava lamp.
That Tommy Gun was bouncin and the hoes where intrigeud like moths to a flame!
by nickypop November 12, 2013
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A Thompson .45 ACP callibur submachine gun. With a large, heavy round, it is extremly powerful at close ranges, however is notoriously inaccurate at long rages. It compensates for this with a very high rate of fire. Can be loaded via a 30 round stick magazine or a 50 round drum feeder, and magazines are commonly stored in 9 clip vests. It utilizes a barral grip, trigger handle and a wooden stock. Due to it's high preformance and relitive simplicity, it is used widly by mobster and mafia (exspecialy in 1930's New York) but was also mas preduced as a reliable weapon in World War Two.
The young American officer sprayed with his Tommy Gun at the group of Gerrys.
by Mark T. July 23, 2005
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Actual name: Thompson submachine gun. It is a .45 caliber weapon firing at about 600-900 rounds per minute. The normal size for the ammo in WWII was a 230 grain bullet. These were just plain full metal jacket bullets, not hollow points. You couold get a wide variety of magazines/drums for your thompson: You could get 20 or 30 rounds stick magazines, and you could also get 50, 75, or 100 round drums. Many poeople loved these drums even though they made the Thompson about 7 pounds heavier, for a grand total of almost 17 pounds. To just look at the weapon, you wouldn't think it could weight that much, but it's just a big chunk of steal. This also helped with recoil.
by Glock_Man June 7, 2006
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Famous 30's machine gun, originally designed for use in WWI but never saw active service. Instead it became a favourite of gangsters from NY to Chicago. Most movies of the time feature its distinctive round under-barrel magazine.
My tommy's gonna make their heaters look like slingshots.
by richard sullivan December 11, 2003
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