head down, bum up

adv

adv

Etymology From an assumed position of strenuous work. Compare nose to the grindstone.

UK, Slang Hard at work; preparing oneself to work hard.

Hadn't heard a thing. Hard at work, head down, bum up.2007 April 6, Gold Coast Bulletin, "Call of Sea Sirens"

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.