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8.
The leg of an obese person, usually of the female specimen, that is thick with cellulite and bulging. Produces a "boom" sound that shakes the ground when used for walking or even running(running is not recommended as it can serve as a hazard and cause serious damage to the surrounding environment). This condition can be overcome only by using tinas avon cellusculpt gel.
that boombalda has fatty boomsticks. The ground is shaking when she walks.
by umbie March 21, 2004
 
9.
a shotgun, especially a sawed-off shotgun
That boomstick looks a little worse for wear.
by The Return of Light Joker February 01, 2012
 
10.
Lighter
The only boomstick I use is bic!
by DrBong May 07, 2012
 
11.
Weapon that Chuck Greene uses from Dead Rising 2.

He obtains the combo card once he has reached level 40 or by defeating psychopath mechanic Jed Wright in Case 0.

It's a Mossberg shotgun with a pitchfork taped to it and it kills zombie by attaching the pitchfork and letting the shotgun rip!!!
Person 1: Look check me out on Dead Rising 2, I am using the Boomstick!

Person 2: Did you get it from Case Zero?

Person 1: No, I gained it the hard way by levelling up to 40.
by Inferno986return November 25, 2010
 
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
 
13.
a gun,usually one used for close range.
used in red-neck slang. more of a joke. 'I'm going to shoot you with my boom stick'
by mishaun July 24, 2006
 
14.
A shotgun, usually used when playing halo 2
MOTHER....Wait till i get my boom stick!
by Daniel December 19, 2004