arseflaps 

Arse Flaps
Someone with a rather large fatty arse, when they move, the fat 'flaps'

Insulting because, not many people like 1)referal to their arse and 2) not many people like being called a fat arse

Used by Dani Filth

Hey arseflaps...

She's so fat, her arseflaps

arseflaps by Ross April 19, 2005

arselash 

1) when a male is lashed across the buttocks by another male

2) can be used as a spontaneous word to express anger

1) "so i went to this gaybar the other night and ended up getting totally arselashed..i couldnt sit down for hours"

2) "oh arselash, its never going to stop raining"

arselash by joe and leanne January 22, 2008