Definition: The term "buttstock" is a slang term that refers to a type of firearm designed for use with a buttstock, which is an extension or attachment on the end of the trigger. The buttstock is typically used in semi-automatic and automatic firearms, such as those found in modern rifles and shotguns. It is often depicted as a curved piece of metal extending from the barrel of the firearm and connecting to a lever or other mechanism that allows the gun to be held by the user.