be on the bum

be on the bum

To not be working correctly or properly; to be out of order; broken. My car has been on the bum ever since I let my brother borrow it for the weekend. I think our washing machine is on the bum—these clothes are all sopping wet and don't smell clean! I was going to make a smoothie, but the blender's on the bum.
See also: bum, on
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
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