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 Day Jammer October 16, 2016

by Richard Millie June 4, 2024

by anonymous January 2, 2021

by YOUR ASS IS FAT December 28, 2022

A gootraxian from the game Kaiju paradise. My friends never played it with me but I got jammer and had a mini party!!
Jammer is a Gootraxian that enjoys listening to music through Jammers headphones.
Jammer is a Gootraxian that enjoys listening to music through Jammers headphones.
Eddie/Kaden/Rain/Maxx: "Hey dude guess what!!"
Cotten; "Hm?"
Eddie/Kaden/Rain/Maxx: "I GOT JAMMER :D!!!!!"
Cotten: "Couldn't give two shits you dumb, ugly twat."
Cotten; "Hm?"
Eddie/Kaden/Rain/Maxx: "I GOT JAMMER :D!!!!!"
Cotten: "Couldn't give two shits you dumb, ugly twat."
by Maxxwasfound November 1, 2022

Someone who surprises another person by jamming a firm banana into their butthole while they’re not paying attention.
You should’ve seen the look on Kaylie’s face when Alan surprised her with that firm banana. He’s such a nanner jammer
by Al Reemo December 3, 2024
