A Closter

A chick you shouldn’t of had sex with, but did anyways. Usually they are obese.

John: Look at this girl I had sex with last night!
Jim: Mate, she’s a bit of a closter, wouldn’t brag about that

Withers

To be blue balled

Little John goes to his doctor
Doctor: What seems to be the problem mate?
John: My balls are swollen and sore after being with my mrs last night.
Doctor: Seems to me you have a case of the withers