Liberty Valence, PhD's definitions
A person who usually prefers to have sexual intercourse with way older female, especially the wrinkled, cunt-dry ones.
A: "That eighty-five year old granny gave me a nice BJ last night."
B: "Oh my gosh, you're a friggin' granny slammer!"
B: "Oh my gosh, you're a friggin' granny slammer!"
by Liberty Valence, PhD April 23, 2009
Get the granny slammermug.