Idiom Breakdown

in collar

SLANG

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Definition

Synonym of in harness (“employed; at work”).

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In Context

"[…] so the moment the site Foreman at Wheatfield Way gave Frank the nod we were back in collar, it had been well over four months, couldn't wait to get back to earn some money."

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Also Said As

in harness

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Opposite In Meaning

out of collar