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1.
JTG
JAM THE GUN OR JAMMING THE GUN OR JAMMED THE GUN, used by radar and lidar fanatics when their jammer setup completely jams a Police lidar gun.
Damn! My Blinder m-40 JTG, he didn't even have the slightest chance of a decent reading!
by TsaXX October 19, 2007
 
2.
jtg
an acronym for the phrase 'jerk the gherkin'
i gtg jtg, ttyl
by meµ January 01, 2010
 
3.
JTG
Jersey
Tanned
Guidos
Did you see all of those umpa lumpa JTG's over there? what faggots
by ELFEL July 27, 2011