Fanny = Female Genital Organ (which has expanded from the next example >) & a slang derogatory word for a female.

(comes from a serviceman's vocabulary during the 1st & 2nd World Wars, i.e. "im going out to try & get myself a Fany")
and the term has developed from there to not just mean a female, but her actual sexual organs.

(this could be where the Americans get it from i.e. "im going out to try & get myself some ass (FANY)"
it relates to THE FIRST AID NURSING YEOMANRY (FANY) which was created in 1907 as a first aid link between front-line fighting units and the field hospitals. (FANY's {Fanny} = the nurses)

During the First World War, FANYs ran field hospitals, drove ambulances and set up soup kitchens and troop canteens, often under highly dangerous conditions.

so therefore were mostly the only female's the sex starved soldiers came into contact with.

see > www.fany.org.uk
by Johnny Moon January 3, 2008
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Someone who is very very very smart , a very funny and fun person to be around . A positive influence , has your back whenever . Don't backstab her because she won't do it to you . Speaks for what she believes in , not afraid . Didn't know what popusa meant at first . Roasting skills still in development
That's fanny , she's such a cool person

Wow , okay fanny I got you

Tell me why

Why
by Someone you know December 22, 2016
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Dude, last night she showed me her fanny
by Tog11122 January 24, 2016
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There is only one true definition of this word.
And that is "pussy". Not "butt" or "ass".
The yanks have it wrong again.
Think of it this way: Americans speak English. English don't speak American. It's that simple really.
We are right, you are wrong.And we're not your cousins.
"Nothing i like better than pounding a fanny.That means i fuck pussy. Not ass.Like a gay american"
by phil k April 24, 2005
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American version: arse
British-australian version: vagina
American: i need to whipe my fanny.

British-Australian: My boyfriend blew in my fanny!
by Johnothan_k October 10, 2003
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Can be the booty. Could also be the name of the sexiest women to ever live, she is the definition of perfection. If you find a lady like Fanny, you keep that girl. She is the goofiest, cutiest, and greatest girl to ever live.
Damn, you got a fat fanny.

Wow, Pinche Fanny!
by Huero4123 March 21, 2018
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Pure Sexyness, Unrivaled Beauty, A Face So Cute You Just Want To Pinch Her Beautiful Cheeks, Lips So Soft You Would Wish You Can Have Them But They're Mine And Only Mine.
I <3 You Fanny Babe.

You're so Fanny.
by A Crazy Lover November 17, 2012
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