the eagle flies

the eagle flies

dated slang Payday has arrived. A reference to the bald eagle that is featured prominently on American currency. Used most often in the US Military. Primarily heard in US. I'll have to wait until the eagle flies to pay these bills. The troops are always eager to venture into town when the eagle flies.
See also: eagle, flies
Farlex Dictionary of Idioms.

when the eagle flies

and day the eagle flies
in. payday. (The eagle is the one found on U.S. currency.) I’ll pay you back when the eagle flies. I’ll find you the day the eagle flies.
See also: eagle, flies
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • when the eagle flies
  • day the eagle flies
  • the day the eagle flies
  • king of birds
  • as bald as a coot
  • bald as a coot
  • be as bald as a coot
  • backside