When having anal sex with a constipated woman, the man uses his erect penis to chip away the compacted fecal matter until full penetration is achieved, using a motion like that of a jackhammer.
Man, I gotta find a new girl. Everytime I go to fuck her in the ass, I spend half the night jack hammering!
by Mity J October 23, 2006
 Get the jack hammeringmug.
Get the jack hammeringmug. 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
 Get the jack hammermug.
Get the jack hammermug. by MOCO & P-Phat May 29, 2009
 Get the Jack-hammeringmug.
Get the Jack-hammeringmug. by High Profile December 17, 2006
 Get the jack-hammeredmug.
Get the jack-hammeredmug. 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.
by batman63 May 28, 2006
 Get the Jack Hammermug.
Get the Jack Hammermug. by griz April 17, 2004
 Get the Jack Hammermug.
Get the Jack Hammermug. When one is so hammered (drunk) on drinking large quantiies of Jack Daniels' Whiskey that they don't even know their own name.
Good thing Ray was brought back to the motel last night by his friends, because after drinking a pint of JD he was totally jack-hammered.
by busterboner February 8, 2010
 Get the [Jack-hammered]mug.
Get the [Jack-hammered]mug.