Usage Note
Flingue is a slang (argot) word for a firearm, equivalent to 'piece' or 'gun' in informal English. It is widely understood but belongs to casual or criminal-register speech. The related verb flinguer means 'to shoot' in the same register. Standard alternatives are une arme à feu or un pistolet.
Examples
"Le suspect avait un flingue dans la veste."
Natural Translation
The suspect had a gun in his jacket.

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