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Fanny Granny 

(Noun)
1. A grandma who gets a little too touchy on her husband's booty.

2. A grandma who collects fanny packs and uses them to wipe her butt.

3. A grandma who is mean and does not accept your butt jokes.
1. Stop being a fanny granny and leave grandpa alone!
2. My fanny granny did not let me have a fanny pack, I guess I see why. They smell of butt.
3. Don't be a fanny granny. My butt joke was actually funny.
Fanny Granny by IKnowItAllSucka August 5, 2019
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Your Big Fanny Granny 

Term used by 'Diary of a Wimpy Kid' as a 'your mom' joke.
Substitute Teacher: Greg, can you answer this problem?
Greg: Your Mama!
Substitute Teacher: Excuse Me?
Greg: Your Big Fanny Granny!
Substitute Teacher: Well I hardly think that's -
Greg: Your Slaphappy Grandpappy!

Ur Granny Fanny 

Ur Granny Fanny is 1000% worse than ur dad lesbian and ur mom gay lol together, just saying these words can't kill a person and let them burn in hell forever.
Juan: Your moms birth control and your dad condom combined is not even as bad as you are.
Alex: Shut up gaywad. Ur Granny Fanny.
Juan: *Dies and burns in hell*

Granny fanny

Granny Fanny old lady thinks shes smoking hot.
A old woman thinking she looks smoking hot at 60,but is old and tired and looks like a granny fanny.
Granny fanny by sallyport August 11, 2010

granny fanny

The ost smelliest horriblist thing ever in the world. it has the smell of 80,000 corpses and looks like a giant squid giving head.
" ohh my god ur granny fanny is tickly"
"eeuuuggghhh dude"
"does that thing have a moustache"
granny fanny by Lee April 6, 2005

granny fanny

When a smokin hot chick has a sub-par ass.
Jerry "Man look at that dime!!"
Jose "Are you Fuckin Crazy?! She's got a granny fanny"
Milt "Who cares, she's a brown bagger"
Jerry "Amen"
granny fanny by pro2aria June 6, 2007

Granny Fanny

Panty lines resulting from wearing fullsize panties beneath tight workout clothing such as yoga pants or spandex shorts
Checkout the Granny Fanny on that chick in the yoga class
Granny Fanny by vitesse04 June 27, 2018