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1.
When leaning back on 2 legs of a chair; the Gimn is the most comfortable point just before losing balance.
This can be cannibalized as a verb if so inclined.
Reuben: "Hey man you found your gimn yet"
Duncan "Nah man still working on it"

Scott: "Shit what happened to his head!"
Andrew "He overshot his Gimn"
by Aman123 May 24, 2009