Wiktionary
vb. (context idiomatic English) To act foolishly.
WordNet
v. do random, unplanned work or activities or spend time idly; "The old lady is usually mucking about in her little house" [syn: putter, mess around, potter, tinker, monkey, muck about, muck around]
Usage examples of "monkey around".
Weve got a little saying in our profession that goes: Never monkey around with a psychologist, or hell make a monkey of you.
The hunter swung the screaming monkey around and slammed its skull against a tree trunk.
Some naked children were dragging a sick monkey around the funerary pole on a string.
But if they creep too close to where he's working, or if they look as if they'll monkey around with his machinery.
After ten years of stowing away my problems so the caseworker couldn't monkey around with them, all I have to do is dance the Cha-Cha with some girl and even my chronic stealing is gone.
I used to tower-monkey around Oklahoma working towers for TV stations, and we had to worry about, like, mechanical stress.
Strangest damn feeling for Logan, and then some, to find some guy better than a head taller wrapping himself like a monkey around his arm and using it to climb up to his torso.
He barely managed to restrain the claws from Bes, wrapped like a grinning monkey around the jaw.