To fall in an awkward manner, head over heels.
I fell arse over teakettle down the stairs.
To be scared or frightened to do something. Or to be soft or weak
What? You won't jump of that! Ya watery arse!
A cloud of dust blown from an arse, when a powerful fart is expelled.
Wow man, did you see that? That man has major arse dust.
The state of one's anus after a particularly heavy night of alcohol and questionable street food.
Alright Danny, how was last night?
Aw man, I'm fucking struggling today. Went for a shite and out came a barrage of fizzy bisto. Honestly, I've got an arse like a burst orange.
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."