Fanny 0 antonyms and opposites of Fanny. Noun — British slang for the female genitals; American slang for the buttocks. Synonyms for Fanny beaver beef curtains box bush cock socket cooch coochie cooter flange flaps front bottom front bum hairy banjo ham wallet lips muff quim slit the pink snatch vertical smile whisker biscuit wizard's sleeve booty bum butt hiney keester tush tushie ← Back to the full definition of Fanny