Language variation is closely connected to social structure, professional activities, and group identity. Among the most distinctive forms of linguistic variation are argot, slang, and specialized gambling vocabulary. This article examines gambling argot as a sociolinguistic phenomenon, focusing on its lexical, semantic, and pragmatic characteristics. Drawing upon historical descriptions of French argot, English gambling slang, and legal discourse concerning gambling, the study investigates how gambling communities develop unique linguistic systems that function as markers of identity, secrecy, and social differentiation. The analysis demonstrates that gambling argot is characterized by metaphorical innovation, semantic shifts, lexical creativity, and rapid vocabulary renewal. The findings suggest that gambling terminology constitutes a specialized social dialect whose functions extend beyond communication to include social cohesion, exclusion of outsiders, and the construction of group identity.