Acronym, Definition. SNG, Sit-N-Go (online poker tournament type). SNG, Société Nautique de Génève (French: Geneva Boating Society; Switzerland). Is also more generally used for pointing out a characteristic in someone or something of German origin that does not meet the observer's expectations because it. 78 meanings of SNG acronym and SNG abbreviation in Texting. Get the definition of SNG in Texting by All Acronyms dictionary. Top Definition: Single In Texting.