What is Catflap?
1.
swings both ways -
Dayam, she's such a catflap. She did me AND my boyfriend.
2.
a man or woman who likes both sexes
shes a catflap, hes a catfalp
See
3.
The fleshy outer labia of a minge - can be 'twanged' with hilarious and occasionally dangerous comsequences for the twangee.
Marjorie bent over, exposing her enormous catflap to the horrified gaze of several small boys on vulnerable bicycles.