burn the midnight oil


To stay awake late at night to work or study: “Jill has been burning the midnight oil lately; I guess she has a big exam coming up.”

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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with burn the midnight oil

burn the midnight oil

Stay up late working or studying, as in The semester is almost over and we're all burning the midnight oil before exams. This expression alludes to the oil in oil lamps. [Early 1600s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.