When your plan is slightly squashed but not going terribly wrong.
(In America it's called 'cat-assed', but that doesn't make any sense as it has nothing to do with donkeys.)
"I was going to Tainan this weekend but my plan got cat-arsed so I had to cancel it."
"Meow."
The painful condition suffered by anyone who keeps their wallet in their back pocket while sitting down for long periods, such as when driving long distances. Serious cases of the condition develop during highway driving and/or when the sufferer is wearing skinny jeans.
Joel's wallet arse was so bad you could still see the manufacturer's brand imprinted on his right butt cheek a week after he got back.