|06:41 am - BOOSHFIC: Get Foxed (NC-17) Howard/Vince, series 3, no spoilers|
I'm not from England, so I never really heard the term until the Boosh used it. So batty crease is real? Actually, now I come to think of it, I might have heard it on 'Last of the Summer Wine' too.
I looked it up in Urban Dictionary.
This crease in in one's buttocks is known as the 'Batty Crease'.
Ah, the internet. So good for learning the art of insults.