Top Definition
Acronym for "Grannies I'd like to fuck anally". It's a word used to design a well-conservated women over 60 years-old. You'd like to fuck her anally, because:
1) you don't want her to become pregnant, even if there is almost no chance because of her age;
2) it may be the only orifice on her body tight enough to please you.
Holy Shit! Remerber the Gilf of the other day? Well guess what, she's pregnant now. From now, I'm only hunting Gilfa's.
by |Pete| January 21, 2007
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