Top definition
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
by Quack Que December 01, 2013
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