(informal) A blunder, an error. / (baseball, slang) A fly ball that is weakly hit just over the infielders.

plural of blooper

plural of blooper reel

(filmmaking) A compilation of outtakes featuring amusing mistakes and mishaps that occurred during the making of a film or television show.

(US) 16-inch softball: a variant of the game of softball, played with a larger, softer ball and no gloves or mitts.