bar none

Possibly a shortened form of "to bar none" or "barring none".

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bar none (not comparable)

1. (idiomatic) Without exception; excluding nothing else of the same kind.
   • 1913, Zane Grey, chapter 4, in Desert Gold:

     Mexican horses are the finest in the world, bar none.

   • 1922, James Joyce, chapter 16, in Ulysses:

     . . . Ireland, or something of that sort, which he described in his lengthy dissertation as the richest country bar none on the face of God's earth.

• Follows a superlative-modified noun.

• any and all

• Bornean, bornane