A friend who discourages another female friend from having sex by acting like an unwanted caretaker of her vagina
Hannah: Did Amina hook up with her ex last night?
Fatima: They got to the bedroom but Zainab walked into the room and took her away.
Miraal: What a fannie nannie!
by Destroyerqueen May 30, 2015
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A fanny nanny is someone who carries around a fanny pack. The "nanny" part refers to when for instance a group goes on a rollercoaster and needs a place to put their phones they ask the friend with the fanny pack to carry their phones.
Elena: Hey, Victoria could I put my phone in your fanny pack during the ride?
Adrian: Yeah me too!
Lacey: Me as well!
Sarah: if you don't mind...
Victoria: *sigh* I guess I'm the fanny nanny today.
by The Fanny Nanny July 11, 2013
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When a man slathers a common cleaning product upon his dong and inserts it into his partner's anal cavity, working it in and out until it has been cleaned to his liking.
Jill is ready for a night on the town now that her boyfriend gave her the fanny nanny of a lifetime.
by Jaque Caque December 14, 2009
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1. Used to describe a person with lesser than average intelligence

2. Used in a situation where cognitive thought has been trumped by the sheer stupidity and absurdity of the situation.
1. That Fanny No Nanny just stuck their ice cream on their head.

2. "Wha.. whart is teh fanny no nanny?!"
by TheMightyElk January 4, 2010
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