仅仅为了好玩,只是取乐而已If you do something for the hell of it, you do it without having any particular purpose or wish, but usually for enjoyment.
I didn't know what I wanted to do, so I drove my van round Europe, just for the hell of it. 我不知道自己想要做什么,于是就开着我的小货车周游了欧洲,只是为了好玩而已。