我刚刚在电脑上闲逛。

I was just ___messing ___around on the computer.

别瞎闹了，做你的作业！

Stop ___messing ___around and do your homework!

周四，有太多孩子瞎闹，我们无法监督他们，因为我们只有两个人。

On Thursday, there were so many children ___messing ___around that we couldn't supervise them, as we were only two people.