night owl

noun, Informal.
1.
a person who often stays up late at night; nighthawk.
Origin
1585-95
Examples from the web for night owl
  • One is a night owl who likes to do business after midnight.
  • night owl spectators watch from a pier as the shuttle blasts off.
British Dictionary definitions for night owl

night owl

noun
1.
(informal) a person who is or prefers to be up and about late at night
Idioms and Phrases with night owl

night owl

A person who habitually stays up late and is active at night, as in You can call her after midnight, for she's a night owl. This colloquial term, originally used in the late 1500s for an owl that is active at night, was transferred to nocturnal human beings in the mid-1800s.