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

by YOUR ASS IS FAT December 28, 2022

A random inanimate object you need the apprentice technician to grab but don't have time to call it by it's native name because of ridiculous overhead production demands.
by Cito6661 August 28, 2018

I'm tired babe. Time to put my jammers on.
Man this place is dead. I'm calling jammers on this night.
Man this place is dead. I'm calling jammers on this night.
by Russell Mania February 28, 2023

no exampels for jammer here lol
by Jammer kp (real) May 17, 2023

The act of jamming a penis or strap on repeatedly into the back of a partner's throat, oftentimes accompanied by crying, gagging, vomiting, etc.
by PeePee Le P.U. August 8, 2024
