Being a pistol refers to having a vivacious and impulsive personality. Antonyms to this phrase include dull, boring, and unremarkable. People who are not a pistol are often reserved, and they shy away from the spotlight. They prefer to play it safe and stick to the norm. They are less likely to take risks or be spontaneous, and they are always reluctant to try new things. While being a pistol can be overwhelming at times, it also shows that a person is not afraid to express themselves and live life to the fullest. On the other hand, not being a pistol often means that a person lacks the vibrancy and charisma to stand out in a crowd.