A penis, irregardless of size, with highly volatile and extremely explosive ejaculatory properties. The current mortality rates for women whom allow said eruption to occur inside of the vaginal canal is 49%. There is a 73% chance of tissue damage and a 100% chance of internal bruising at the very least. Mortality rates for those attempting to take the burst orally jumps to 92%. It is not advised to ever let the eruption occur internally as there are 1.4 million projectiles speeding away from the penis at an average speed of 590 feet per second, though the current record is mach 1. Anyone with a penis that may be classified as a boomstick is required to have it registered for it's lethal abilities.
I took one shot from that boomstick and was gagging for a month!
by Pregnant Camel April 14, 2010
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Used by Ash (Army of Darkness) when describing his 12 gauge, double barrel Remington shotgun. His boomstick retails for around 109.95 at S-Mart, and was produced in Grand Rapids, Michigan.

"This is my BOOMSTICK!"
by Anonymous June 30, 2003
A kickass way of saying "shotgun."
This... is my BOOMSTICK!
by Rainsdark January 29, 2003
big nasty shotgun as used by Ash in Army of darkness. Use with movie quote "This is my BOOMSTICK!" when talking to a 14th century primitive culture to explain the principal of firearms and their safe use.
Go watch the film it rocks.
by boomstick October 10, 2003
Double-barrel 12 gauge blue steele Remington shotgun. Retails for around 109.95, produced in Grand Rapids, Michigan.
Shop smart: Shop S-Mart.
by aiden diabhal January 15, 2004
The twelve-gauge double-barreled Remington. S-Mart's top of the line. You can find this in the sporting goods department. That's right, this sweet baby was made in Grand Rapids, Michigan. Retails for about a hundred and nine, ninety five. It's got a walnut stock, cobalt blue steel, and a hair trigger. That's right. Shop smart. Shop S-Mart. You got that?
Alright you primitive screwheads - listen up! Ya see this? This... is my BOOMSTICK!
by Matt..... June 27, 2009
NFL punter Pat Mcafee's kicking leg.
Pat's boomstick is twice the size of his non-kicking leg.
by fatandsassy February 25, 2014
One of the trademark weapons of the movie series "Evil Dead". It is a twelve-gauge double barrel Remington with a walnut stock,cobalt steel barrel,and hair trigger. The main character, Ashley J. Williams,acquires it from the Knowby cabin(Which he states int he third movie can be bought at S-Mart),where he also got his chainsaw hand and the Necronomicon ex-mortis, and he sawed-off the barrel and uses it to fight the deadites in the movies. He calls it his " Boomstick "in the third movie and it also is most famous with the quote " This.....is my boomstick!"
Ash:Alright you primitive screw heads,listen up. You see this? This...is my boomstick! It's a twelve-guage double barrel Remington. S-Mart's top of line. You can find this in the sporting goods department. That's right,this sweet baby was made in Grand Rapids,Michigan. Retails for about $109.95. It's got a walnut stock,cobalt steel barrel,and hair trigger. Shop smart,shop S-Mart.
by AshleyWilliams August 06, 2014

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