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."
by Alayna Darko December 26, 2014
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to beat your meat ferociously, with great speed
The student was suspended for doin the jackhammer in the bathroom
by Mike Pitts October 4, 2007
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Created after the orginal thought of the drill, the jackhammer takes speed and power in order to work. Start by creating a fist. Then, get into a stance that will allow maximum power and speed. Arch your back forward and thrust your fist through your other hand, in some what of a punching motion. Try to build up speed. That is the secret of the Jackhammer. Kids, don't try this with grandma in the room.
"Your Drill's got nothing on my Jackhammer"

"Why don't we just stick the Jackhammer in with all the other tool techniques."

"I hope you're proud. Damn you drill and Jackhammer!"
by Daikirai July 13, 2006
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An alcoholic drink made by mixing Jack Daniels whiskey and orange juice. The whiskey equivalent of a screwdriver.
"I haven't been feeling well, can we drink something with orange juice?"

"We don't have any vodka, but we do have whiskey, we could go with Jackhammers."
by Greg Rucker October 29, 2011
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A particular method of thrusting used only by advanced sex fiends or clueless morons. Commonly utilized when yo bitch is in teh Deep Thrust position.

The Penis is inserted into the vagine, and the body is moved forward until the penis enter the vagina at a 90 degree angle. A lot of the pleasure in this posisition is derived, I believe, from the fact that the vagina isn't in a perfectly upwards (90 degree angle) which leads to some awesome griding acckkkshunn :DDDDDD~~~~
by TittayMastar May 26, 2003
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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
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An agressive way of fucking where the male mounts the female, buries his head into the pillow and goes at it like a 'jackhammer' using long strides with a very fast tempo, turning his head to the side when needing to take a breath, Like an Olympic swimmer.
While I was giving her the jackhammer, you could hear a "slap slap" sound through the entire house.

I give my mrs the jackhammer last night

I only last 2 minuets when performing the jackhammer
by VLFlad October 29, 2019
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