burned the midnight oil

Studied all night

To burn the midnight oil is to work or study late into the night, past normal sleeping hours.

The phrase evokes an era when oil lamps provided light after dark: She burned the midnight oil finishing her thesis.

It implies sustained effort and dedication, often with a note of exhaustion.

Related

fatigue · candle · lamp · perseverance · nocturnal · overtime · deadline crunch · research · burnout · long hours · coffee · red eye · studying · stamina · reading · endurance · clock · weariness

Opposites
work ethic and diligence

burned the midnight oilslacked off

Reduced one's effort

coasted · loafed · lazed about · idled · goofed off

sleep and rest patterns

burned the midnight oilcaught some z's

Slept for a while

hit the sack · early to bed

work intensity and pace

burned the midnight oilprocrastinated

Postponed action unnecessarily

put it off · dragged one's feet · kicked the can down the road · dillydallied · put on the back burner

Family

burned, burnt, burning, burner, midnight, midnights, night, nights, nightly

Familiarity
Top 100,000
Profile
Used worldwide · Timeless · Everyday, not technical · Rated G