Define Bar None Meaning

I'm the best dancer in here, bar none.

.... and here's Messi....away from (1), 2, 3, 4....wonderful, wonderful, wonderful.... How good is he?! A mere supernatural goal from Lionel Messi! He has wriggled and tiptoed his way to the gates of Wembley Stadium. He is just brilliant. Best player in the world, bar none

Bob: "Hey Ann, what bar you going to?"
Ann: "Bar None, it's the best, bar none!"

Gordon: Damn she is hot bar none
Jack: what?
Gordon: She is so hot that nobody can compare