Knuckle down to something - Idioms by The Free Dictionary
knuckle down to something
knuckle down (to something)
in. to get busy doing something. Please knuckle down to your studies.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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
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.