Definition
To be idle and do nothing, particularly when one should be actively engaged in work or other activities.
（尤指在應該做事時）遊手好閒，什麼都不做
He just sits on his arse all day while we're all working our tails off.
他整天就坐在那裡無所事事，而我們都在拼命工作。
Don't just sit on your arse, give us a hand!
別只是坐在那裡無所事事，來幫個忙吧！
I'm tired of watching you sit on your arse all day.
我受夠了整天看著你無所事事的樣子。