Flint means fire starter. A hard, sharp, but brittle substance.
Flick is an annoying gesture that brings a painful pinch.
Sometimes, translating something requires a bit of “localization” as well. Like if the protagonist’s name in Chinese is “Long Wang” then you should probably translate it as “Dragon King” instead of “Big Dick.”
If the name is supposed to be “cool” then make it something cool in English.
Regardless, thank you for providing a translation. As a translator, you get to make whatever choices you prefer.