jackhammer 

The heavy weapon of the New Conglomerate in the PC game Planetside. The Jackhammer is a three-barrled fast firing shotgun that is commonly used as a frontal assualt weapon.

I owned that noob with my Jackhammer.

jackhammer by DarkFusion April 14, 2004

Jackhammer 

When a man jacks off like a hammer

He did a jackhammer last night

Jackhammer by Coopachup November 28, 2018

jackhammer 

Jacking off into your hand and then slapping your buddy with your cum and then slapping them with flour.

"We couldn't pass up the opportunity to jackhammer Greg after he got turnt as fuck at the party last night."

jackhammer by Alayna Darko December 26, 2014

Jackhammer 

Where a girls sits on a guys dick while he motorboats her and they make out and girl gives a lap dance

Me and Joel did they jackhammer last night

Jackhammer by Lolfun2711 January 3, 2014

Jackhammer 

A rather dangerous looking dildo that is used mainly by females that could be described as an alisa

hey dude i heard about that girl. watch out for the jackhammer.

Jackhammer by General Bradley January 22, 2005

Jackhammer 

When jacking off so close to a girls face, that your motions continually hit her in the face, in a constant punching rythm.

Suzy pissed me off, so when we were done, i jackhammered her bitch ass.

Jackhammer by Nick May 13, 2005

jackhammer 

Jackhammer is a really fast shooting shotgun which can open doors. Usually used by special assault teams of the police.

A. Wow that's been fun
B: Yeah, he hammered the door open like jack himself

jackhammer by jackhammerboy October 13, 2003