Definition
This idiom describes doing something without a specific purpose or intention, typically for enjoyment or on a whim.
就是喜歡、就是闖心、就是闖狂
He decided to sign up for the marathon, just for the hell of it.
他決定報名參加馬拉松，只是為了好玩。
We drove to the beach without any plan, just for the hell of it.
我們毫無計劃地開車去了海灘，只是因為一時興起。
She dyed her hair on a whim, just for the hell of it.
她一時興起染了頭髮，只是為了好玩。