A gaff-rigged fore-and-aft sail set from and aft of the aftmost mast of a square-rigged ship; a spanker.
A fly ball that is weakly hit just over the infielders.
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.
A blunder, an error.
A pole, often iron-pointed, used for pushing boats along in shallow water.