Definitions of fanny
  1. noun
    the fleshy part of the human body that you sit on
    “are you going to sit on your fanny and do nothing?”
    synonyms: ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush
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    type of:
    body part
    any part of an organism such as an organ or extremity
  2. noun
    external female sex organs
    synonyms: female genital organ, female genitalia, female genitals
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    external parts of the female genitalia
    type of:
    crotch, genital organ, genitalia, genitals, private parts, privates
    external sex organ
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