head down, bum up

English

Pronunciation

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Adverb

head down, bum up (not comparable)

1. (slang) In a figurative bodily position adopted when working hard at some task, either physical or mental.
   • 2007, 6 April, Gold Coast Bulletin, Call of sea sirens, [1]

     Hadn't heard a thing. Hard at work, head down, bum up.

Synonyms

• nose to the grindstone