slack-arsed

Term used to describe someone who is known for dropping an inordinate number of farts, usually to their to own delight.

Eh, you shit?
Yeah! (gleefully)
You slack-arsed bastard!

by ant August 9, 2004

Slack arse

Does not mean an unfirm bottom, but it means a person who is very lazy

I had to fire David as he was a slack arse

by Windy28 September 3, 2009

Slack arse

A word used for someone who receives anal a lot.

That girl Wendy over there, I heard the whole football team has put it up her arse. She must be a right slack arse.

by Yeahyea June 8, 2015