The full form of SNM is say no more
SNM normally means “say no more”. You would say this when someone tells you something and it’s enough detail that you don’t want anymore. Maybe it’s because the situation is disgusting and you don’t want to hear the rest of the story. Or it could be because you get the person’s point and don’t need extra elaboration.

Other Meanings
Snm also has other meanings besides “say no more”. On Twitter, #SNM means SNOM, which is a type of cryptocurrency coin. SNM also stands for “sacred name movement” and “Sant Virankari Mission”. As well as “show no mercy,” “sex n money,” and “smoke n mirrors.”

S & M is also a sexual fetish that stands for Sadism & Masochism. This means that you and/or your partner are receiving sexual gratification and pleasure from including pain in your sex. Maybe you’re involving choking or spanking. Leather and collars are also frequently used.

Conversation Examples
Payton: Raincheck for 2nite
Chloe: y
Payton: fml grounded
Chloe: wtf
Payton: hmu later ill fill you in
Chloe: snm ttys