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12.
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
 
1.
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
 
2.
A kickass way of saying "shotgun."
This... is my BOOMSTICK!
by Rainsdark January 29, 2003
 
3.
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
 
4.
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
 
5.
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
 
6.
NFL punter Pat Mcafee's kicking leg.
Pat's boomstick is twice the size of his non-kicking leg.
by fatandsassy February 25, 2014
 
7.
The bat of Nelson Cruz which allows him to hit a baseball amazingly far.
Man did u see how far that homer hit byNelson Cruz off Justin Verlander in 2011 ALCS went, it must have been his boomstick
by baseball hombre October 15, 2011