Top Definition
Crushing someone elses head in between your buttocks.
We were going to shoot him, but we decided to perform a gremline instead.
#butt #smash #head #grem #line #gremlin #gremmline
by UbEr1337gUy January 18, 2007
The act of crushing someones head inside of your butt.
"Gremline!"

"MMF!"

"FATALITY"
#gremline #butt #crushing #head #fatality
by UbEr1337gUy January 14, 2007
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