A fanny, which smells like fish and has not been washed for a while after being jebbed!
''Man, Did you smell her fish flaps?''
''You wouldn't believe what came out when I parted her fish flaps''
''Ooooo she's got big fish flaps''
This is to describe the female labia area which is stinking of fish.
The flaps hang quite low and are smelly.
That girl has fish flaps! I can smell them from here!
Jim: I went with this girl the other night and she has fish flaps!
Cuthbert: Thats disgusting! I hope u didnt muff her?!