People were having fun in the pool, swimming or just splashing around.

人们在游泳池里或者游泳，或者只是拍打戏水，开心地玩着。

《牛津词典》

So far most online corporate hoaxers seem relatively harmless. They are doing nothing worse than satirising companies or just having a bit of fun.

迄今为止，大多数公司网络冒充者似乎是无害的，他们只是讽刺公司或者只是开玩笑。

youdao

Being fun means having fun yourself and enjoying your time whether it's with a specific girl or just friends in general.

有趣意味着你自己要快乐，要享受你的快乐无论是一个女孩或者只是普通朋友。

youdao

Or just having fun on the side.

FORBES: Should there be doorman-resident privilege?

Mildly, disaffected Democrats, who knew their candidate for governor in 2006 had no chance, and so they voted for Kinky Friedman simply because they like the cut of his jib or were just having fun.

NPR: In Texas, Not All Voters Are Equal

Is there anything to be gleaned here or was this just another case of traders having fun with their computers?

FORBES: New Wall Street Term for 2011: De-Risking