The storm 'threw a monkey wrench into' their plans for a picnic. [=the storm ruined their plans for a picnic]
After many years of disappointment, she finally 'got the monkey off her back' by winning the championship.
Our teacher warned us not to try any 'monkey business' while she was out of the room.
(..) Do you know the reason? Hmm? No. No... Oh, all right. Hang on. They don't call me "the little dipper" for nothing. Like a chicken...with the face of a monkey... I fly. Let me know when you're ready for another round, M'Lady. Well, he was sprightly. Especially for a man in heels. This is so nice. (..)2013 Frozen