burn the midnight oil ( d+ _! {# c% Y! F (verb phrase) / v& |1 x' Z) z4 {, B. X5 A8 ~. p* w to work hard very late into the night--and as if working only by the light of an oil lamp 9 Z# A2 X, A( z: k; p; \& r EXAMPLE: : ^+ I2 p9 `- U# e "The manager had so much work piling up on her desk she knew she was going to have to burn the midnight oil to finish it."