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.
(..) - We just got the message. - Is he all right? Yeah, the doctor got the K out. He also found an M and an O. We think he was trying to spell out "monkey." The doctor says he'll be fine. He's just sleeping now. So you feel like a dad yet? No. Why? Hey, come on, you came through. (..)1995 TvShow: Friends Title: The One with Two Parts: Part 2 Season: 1 Episode 17
(..) Yours. I just got points for "kidney." No, you got zero points for "idney." I had a K. Where's my K? You've got to help me. My monkey swallowed a K. Get that animal out of here. The animal hospital is way across town. He's choking. I don't know what to do. - What's going on? (..)1995 TvShow: Friends Title: The One with Two Parts: Part 2 Season: 1 Episode 17