Have your girlfriend kneel on the floor, with her back against the wall, and begin to give you head. Once she gets the rhythm going, push your entire penis into her mouth. When she starts to gag, there’ll be a recoil reaction. Then when she bangs the back of her head off the wall, she’ll be slammed back into the gagging position. If you continue to push and pump your penis into her mouth, this should result in a successful Jackhammer. Repeat as necessary.

For added suction, plug her nose once the Jackhammer has been achieved. This is pleasurable for both the man and the woman. This is also a variation of the air-tight seal.
Scott heard a loud and rapid thumping noise coming from his room mate's bedroom. He opened the door to see if there was a problem. He was relieved to tits bouncing, arms flailing and a smile on his buddy's face. Bill was face-fucking his girlfriend against the wall. Jackhammer!
by Big C January 15, 2004
Top Definition
A sexual position similar to Doggystyle, but you lift her legs off the ground. Then you stand, forcing her body to be arranged at a downward angle. It is named for the resemblence of a construction worker pounding away on a jackhammer
Jim: Can we go fr Doggy tonight?
Alicia: Doggy is getting boring, lets mix it up, JACKHAMMER ME!!
Jim: Who's your daddy bitch
by Smizzles fo Rizzles September 18, 2007
A very agressive way of fucking, using long strides with a very fast tempo.
While I was giving her the jack hammer, you could hear a "slap slap" sound through the entire house.
by T. Lux. April 28, 2003
1. A sexual manuver of constant re-penetration; basically taking the dick in an out of the vagina (or anus) repeatedly, in a 'jackhammer'-like motion / or jacking off on a chick's face from a really short distance away

2. a prototype 'automatic' shotgun (worked with a feeding mechanism much like a revolver), was designed by John Andersen, it fires 12 gauge rounds, in a 10 shot 'magazine', has a ROF of approximately 4 shots per second. These are not really in any form of production
" Dude, I jackhammered pretty good her last night, she can barely walk now"
by LarryVR March 22, 2006
the sexual act of a man repeatitively penetrating a woman's entry hole with rapid up and down movements similiar to that of a jackhammer
Alex jackhammered Jody so hard that she could not walk the next day.
by Megan and Katie September 18, 2005
having a girl lay on her back on the floor with ass in the air while you are horizontal above her with hands on the coutch and feet on end table jack hammering the piss out of her.
Mike broke the table last night tying out the jack hammer on his new girl.
by batman63 May 24, 2006
sex move in which - holding chick’s ankles as man is standing up and chick dangles with shoulders resting on ground or lower surface
I gave her the jackhammer
by JBut November 24, 2007
A powerful gun with a big kick-back that would act like a jackhammer in your hand
Coming hard with the jackhammers
by RDE45 April 11, 2008
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