'Ohh yes winter is here and the girls are out and about. There's Gorilla's thumbs all over the place'
by Mongymax October 26, 2007
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A penis - particularly a penis that is curious and/or searching for something. The gorilla thumb might be particularly hairy or thick, although not necessarily. Ideally, it doesn't have a fingernail.
I'm tired. Get your gorilla thumb away from me.
by bullfrogboy October 9, 2008
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Jessica: "Davon had such a gorilla thumb and I wasn't ready for it!"
by JimboSlice13 July 14, 2017
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