An acronym standing for Fuck Me Gently With A Chainsaw. Used when cursing one's situation, or after making a dire mistake. Sometimes used as an alternative to fuck me or FML.
Jesus, my house burned down and i still have to file those reports by tonight, FMGWAC.

Shit! I told my boss to go fuck herself, fuck me gently with a chainsaw!

or I just marched for 8 hours, fuck me gently with a chainsaw!
by Ausgezeichnet August 25, 2009
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