Grandmilf

1. n A beautiful sexy mom of a mom.
2. n Grandmother I'd like to fuck. Synonymous with Gilf.
3. n A great puma in her fifties or sixties.
Steve: Hey, check her out. She might actually be a grandmilf!
You: You know Steve, you may be right!
by Johnsterama November 06, 2007
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GrandMilf

A GrandMilf is simply a Mum I'de Love to Fuck, whos children have children.
I pulled what i thought to be a milf the other night who looked and acted like a porn star. after a couple of hours she told me she had grand children it was at this point in time I realised there were also GrandMilfs.
by Anus Raper October 10, 2008
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great-grandMILF

A really, really old mom I'd like to fuck.
David: "Damn that bitch is smoking hot. I'd really like to get into her panties."

Frank: "Dude, she's like ninety-eight years old! She's in a fucking wheelchair and I doubt she's wearing panties... probably depends and a catheter or something. And look at that blank stare. She probably has Alzheimer's and wouldn't even know what's going on. You're fucking sick, man."

David: "What can I say? She's a great-grandMILF."
by phase_coherent February 26, 2010
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