1an embarrassing error:he poked fun at his own tendency to utter bloopers [as modifier]:blooper shows consisting of out-takes from films
2 Baseball a weakly hit fly ball landing just beyond the reach of the infielders:Hunter’s the only guy to get a hit, a blooper over the shortstop’s head
Origin:
1926 (originally US, denoting a radio which caused others to bloop, i.e. emit a loud howling noise): from imitative bloop+ -er1
blooper in other Oxford dictionaries
Definition of blooper in the US English dictionary