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1.
Adj/Verb. Acronym standing for Granny Tranny Prego Midget Footsex.
First discovered when scientists combined as many fetishes as possible without being farcical.
Dude, that GTPMF porn i watched last night was the bomb!

grannygrandmagrandmotherpregopregnantmidgetdwarffootsexfootsexfootjobfoot sexfoot job
door Quack Que 1 december 2013