What is the meaning of Blooper?

A blunder, an error.

A fly ball that is weakly hit just over the infielders.

A filmed or videotaped outtake that has recorded an amusing accident and/or mistake.

A gaff-rigged fore-and-aft sail set from and aft of the aftmost mast of a square-rigged ship; a spanker.

A radio which interferes with other radios, causing them to bloop (squeal loudly).

The Vietnam-era M79 grenade launcher (due to its distinctive report).

blooper

Source: wiktionary.org