blooper

noun6

1. •
   (informal) A blunder, an error.
2. •
   (informal) A filmed or videotaped outtake that has recorded an amusing accident or mistake.
3. •
   (slang) A fly ball that is weakly hit just over the infielders.

   • The blooper, delivered with a shot-put motion, floated in an arc that reached twenty-five feet, then suddenly dropped across home plate in the strike zone. — 2003
4. •
   (US, slang) The Vietnam-era M79 grenade launcher (due to its distinctive report).
5. •
   A gaff-rigged fore-and-aft sail set from and aft of the aftmost mast of a square-rigged ship; a spanker.

   • Once the blooper is around the spinnaker, let out the blooper sheet completely (which collapses the blooper), race the blooper sheet forward and reset on the other side. — 1976
6. •
   (US, old-fashioned) A radio which interferes with other radios, causing them to bloop (squeal loudly).