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3. on the bum

on the bum

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on the bum

Not working correctly or properly; 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!

See also: bum, on

on the bum

see under on the blink.

See also: bum, on

on the bum

1. Living as a vagrant or tramp.

2. Out of order; broken.

See also: bum, on