knuckle down to something

knuckle down (to something)

in. to get busy doing something. Please knuckle down to your studies.
See also: down, knuckle, something, to
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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References in periodicals archive ?
IF IT'S YOUR BIRTHDAY: Your first six months are hectic, with lots happening on the travel and social scene, but things will quieten down and you might knuckle down to something more serious.
A sky surfer's life is a short one and one day he knows he will have to hang up his surf board and knuckle down to something a bit more down to earth.