(UK, slang, vulgar) The labia minora.
Ewwwww, just hope to God she had plastic surgery on her fanny flaps.
No comments yet — say something.
Add your own interpretation of "fanny flaps".
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.