mess around

US /mes əˈraʊnd/
UK /mes əˈraʊnd/
"mess around" picture
1.

瞎胡闹, 玩闹

to behave in a silly or playful way

:
Stop messing around and get your work done.
别再瞎胡闹了,把工作做完。
The kids were messing around in the backyard.
孩子们在后院玩闹
2.

乱搞, 有不正当关系

to have a casual sexual relationship with someone

:
He's been messing around with someone from work.
他一直在和工作中的某人乱搞
I heard they were messing around for a while before they got serious.
我听说他们在认真之前乱搞了一段时间。