the ultimate insult, often used by penguins in cartoons.
Jeff the penguin: i forgot your birthday
Bob the penguin: you twatbadger
An older woman's slightly greying pubic hair.
Vanessa lifted her skirt, displaying her well-trimmed twatbadger.
I got served by this right twatbadger at the car showroom, I think I might have got fucked over big style.