PPK is a common abbreviation for a handgun model called the Walther PPK. However, it can also be used as an acronym for various phrases such as Personal Protection Kit, Pre-Production Kit, Primary Power Key, or Product Planning Kit. Depending on the context, other synonyms for PPK may include terms such as personal defense weapon, compact pistol, concealed carry firearm, or even simply gun or firearm. Additionally, some people may refer to the PPK as a James Bond gun, as it was famously used by the fictional spy in several of the early Bond novels and movies. Overall, there are many different ways one could refer to a PPK, based on its particular use or application.