for the hell of it
US /fɔr ðə hɛl əv ɪt/
UK /fɔr ðə hɛl əv ɪt/

1.
為了好玩, 只是為了取樂, 無緣無故
for no particular reason; just for fun or excitement
:
•
He decided to climb the mountain just for the hell of it.
他決定爬山只是為了好玩。
•
I bought an extra ticket for the hell of it, in case someone else wanted to come.
我多買了一張票,只是為了好玩,以防有人想來。