knuckle down

English

Etymology

1864 in American English, from the game of marbles.

Verb

knuckle down (third-person singular simple present knuckles down, present participle knuckling down, simple past and past participle knuckled down)

(intransitive, chiefly Britain, idiomatic) To get to work; to focus on a task.
You should knuckle down and do your homework!

Synonyms

belly up to the bar, get one's act together, pull up one's socks, roll up one's sleeves, shape up

See also

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