night-fly1
/ˈnʌɪtflʌɪ/noun
Angling. An artificial fly used in night-fishing.
Origin
Early 17th century (in an earlier sense). From night + fly.
night-fly2
/ˌnʌɪtˈflʌɪ/verb
[with object] And without object. To fly (an aircraft) at night.
Origin
1920s; earliest use found in The Daily Telegraph. From night + fly, after night flying.