Wiktionary
vb. (present participle of burn the midnight oil English)
Usage examples of "burning the midnight oil".
But Dick isn't sure which antibiotics to use, if any, and he's burning the midnight oil trying to find out.
Angel's Reach was in darkness, but shortly Georgie would be burning the midnight oil earning her million pound advance as she worked on her new album to be handed in by Christmas, and to the left he could see the jewel-coloured stained-glass hall windows of the River House.
Last night I went to bed and he was still burning the midnight oil.
It had been something of an effort for him to get an unscheduled meeting with Stearns, as the increasing pressure on the office of the Prime Minister of the United States of Europe was filling the man's day from end to end and frequently had him burning the midnight oil.
Heimie Rosenburg -- God bless his soul -- was killed tonight and tonight I find you burning the midnight oil.