buttstroke

the act of striking someone with the buttstock of a rifle, carbine, or shotgun. This is in contrast to "pistol-whip," which is the act of striking someone with a handgun, while gripping either the handgrip or the barrel/slide, but more commonly the latter.

the action of hitting someone very hard in the face, gut, genitalia or other highly sensitive area (typically gender specific) with the butt of a rifle, shotgun, pistol or other firearm with a designated "butt".

1. The act of striking an opponent with the butt end (rear) of a rifle or other similar shoulder-fired weapon. Used in the absence of a bayonet or conditions that prevent its effective use. Can often be seen in FPS games as the default melee attack when using a rifle type of weapon, in the absence of a knife attack.

2. A method for clearing a firearm, specifically a stocked rifle or a shotgun, when dealing with a stuck bolt or case preventing the bolt from being effectively retracted. The charging handle is gripped firmly and the weapon is slammed down on the ground, butt-end first, to aid in either extracting the case, or releasing the casehead from the bolt face. Generally a sign of poor ammunition or weapon maintenance.

Slang for when someone propels themselves through a still body of water, usually a swimming pool, entirely by passing gas.