A blunder, an error.
A fly ball that is weakly hit just over the infielders.
A gaff-rigged fore-and-aft sail set from and aft of the aftmost mast of a square-rigged ship; a spanker.
The Vietnam-era M79 grenade launcher (due to its distinctive report).
A filmed or videotaped outtake that has recorded an amusing accident and/or mistake.
An error; a blunder.
A pitch which was intended to be pitched in a hard-to-hit location, but instead ends up in an easy-to-hit place.
To understand wrongly, taking one thing or person for another.