A sexual act involving 4 people. A man gets his legs held above him by two (2) people and held apart, in a "V" shape. A fourth person is then helped in between the man's legs and his balls are then used as a trampoline until he cums.
Mike: Yo, Steven. I heard that Stacey gave you the Jamaican Jackhammer last weekend
Steven: Yes mate, I've been in intensive care cos Kate and her sister held my legs open and Stacey weighs 250kg
Steven: Yes mate, I've been in intensive care cos Kate and her sister held my legs open and Stacey weighs 250kg
by Steven Skibidoviç September 21, 2024

by Wheels97 February 27, 2021

Hey, did you see the Duffy woodcock wet william HHH hill rollin oovoo java jackhammers caf at wing stop this weekend? It was awesome!
by DWWWHHHHOJJCAF March 21, 2024

When jacking off you cannot bust and you begin to sweat and your arm begins to cramp and feels like you have been using a jackhammer for an hour
by BKing19 May 03, 2012

When a man spreads the woman's vagina flaps and attempts to stick his head into it. This normally ends up with a trip to the ER as it is not safe for both genders. This can be done with the same sex (see Finnish jackhammer).
by The isis November 12, 2014

When a random person (usually a hobo or homeless person) goes up to any male walking down the street at random, and out of nowhere, quickly pulls down their pants and jacks them off at the speed of a jackhammer as they immediately ejaculate with no warning. The person doing the act then sprints off. The entire process is completed within a matter of seconds. This often occurs in Casper Wyoming which is in Natrona County.
Jake received the Natrona Jackhammer and didn’t catch a glimpse of the culprit!
Woah! I just got Natrona Jackhammered!
My friends and I are going to Natrona Jackhammer some people.
Woah! I just got Natrona Jackhammered!
My friends and I are going to Natrona Jackhammer some people.
by regierawlins69_luskjelm August 03, 2021

A position used in intercourse where the man will hill hold his partner upside down by the legs with his partners head on the bed. The man will then stick his penis into the girls vagina and make sex
by Tony fettuccine Linguini September 07, 2020
