by Slam Jammer May 28, 2019

by Pamy_Chan August 27, 2020

A Klamath Jammer occurs when your wad of Copenhagen chewing tobacco is dislodged from your lower lip while attempting to insert a second cock into your mouth.
All of these Klamath Jammers have depleted my can of Copenhagen. I’ll have to go buy more at Town Pump.
by The Natist August 20, 2021

Heart attack. Jamming of the arteries
Don't give Ed a surprise birthday party. The man is 85! He might just have a big jammer and die before we can serve the cake!
by Kim Fulcher March 12, 2015

by D. Gould July 30, 2008

by Adam138 September 18, 2010

The advanced art of standing in front of someone, inserting your fingers into their anus, then forcefully rotating your wrist 360 degrees, it doesn't matter if it breaks, slowly insert more of your arm into the anus, then another forceful 360 movement, this time on your arm. Once this is completed, a full bottle of gorilla glue is applied to the arm and anus, locking it in place.
John: Hey Peter, why is your arm mangled?
Peter: Because I hit Dave with that reverse 360 piston jammer!
John: Peter, you're dead to me you retarded nigga.
Peter: Because I hit Dave with that reverse 360 piston jammer!
John: Peter, you're dead to me you retarded nigga.
by ThatSigmaRizzDawg January 17, 2025
