verb (used with or without object), flubbed, flub·bing. to perform poorly; blunder; bungle: He flubbed the last shot and lost the match.

What does flub mean?

transitive verb. : to make a mess of : botch flubbed my lines. intransitive verb. : blunder. flub.

Does flubbed mean failed?

The mistake or blunder itself can also be called a flub: "The concert was terrible, full of flubs." The word's been around since the 1920's, possibly influenced by words like "fluff" and "flop," and definitely coined in the United States.