dry arse 

Someone who is a 'dry arse' or 'dry' is someone who backs out of drinking alcohol for a reason which is not legitimate.

Person X: I'm goin to get so pissed tonight. Are you?
Person Y: No, i'm gonna stick to lemonade, I don't want to get drunk.
Person X: You fucking dry arse!

Here, person Y is being a dry arse because he/she is backing out of drinking alcohol.

dry arse by Jonny Lignier December 7, 2006

Dry arse 

Someone who gets offended at a joke for no reason

"Mate sahra is such a dry arse"
"I know all you did was call her a puff"

Dry arse by Biggingie September 5, 2020