knuckles down

Applies oneself diligently

To knuckle down is to apply oneself seriously to a task, often after a period of distraction or delay: I need to knuckle down and finish this report.

The phrase suggests buckling in, getting to work, focusing.

Knuckles down is the third-person singular form: She knuckles down whenever deadlines approach.

Related

get serious · endeavors · strives · hunkers · apply oneself · nose to the grindstone · grind · diligence · industriousness · put in the work · applies · perseverance · roll up sleeves · brow · labors · grit · tenacity · hunch

Opposites
effort and focus

knuckles downslacks off

Reduces effort deliberately

goofs off · loafs · idles · lazes about · procrastinates

seriousness of engagement

knuckles downmesses around

Engages in aimless activity

fools around · plays around · blows off · dismisses · neglects

work discipline

knuckles downgives up

Ceases effort or resistance

quits · throws in the towel · abandons · neglects · shirks

Family

knuckle, knuckles, knuckled, knuckling, down, downer, downs, downed, downing

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Everyday, not technical · Rated G