to stay up all night doing work. often homework.
i burned midnight oil last night but slept in coz i was too tired
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To stay up all night working. Apparently some drop the "the", though this must be rare.
Man Bob, you must have really burned the midnight oil on this one!
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To do hard drugs(cocaine, heroin meth, etc)
Dustin burning the midnight oil.
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To stay up smoking the marijuana rather than sleeping. Usually followed by an attack of the munchies, resulting in a loss of snack food.
"I'm sorry i fell asleep in your class, Professor, but I was up all night burning the green midnight oil."
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Make coffee to stay awake
Boil some water, I'll be burning the midnight oil and I take my coffee black.
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