A number 1

a number one

Of the very highest caliber, standard, or quality. That was a number one performance last night.
See also: number, one
Farlex Dictionary of Idioms.

A number 1

verb
See A-1
See also: number
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • a number one
  • number one
  • a number of
  • a number of (something)
  • number of things or people
  • number one with a bullet
  • number off
  • any number of
  • digit
  • double-deuces