Stop all this monkey business and do your homework!

I’m going to take off the cuffs, Slim, and off you, Jerry. But don’t try any monkey business. When Peters answers the door, you tell him everything’s O. K., and that you’re the committee, see? Once the door’s open, we’ll do the rest.

2008-05-01, “Monkey Business With ‘Bigfoot’ And ‘Big Monkey’”, in Malaysia Today:

I'm looking for monkey business / Just playing around / I'm here on monkey business / And look what I found

She wondered what sort of monkey business her neighbour was up to, sneaking out of his house at 1:00 am.

Monkey business

Meaning

Noun

Synonyms