SC is used with the meaning "Silent Chuckle" as an expression of amusement. In this context, it may indicate that the sender genuinely found something funny. However, just as with many of the other abbreviations that indicate amusement (e.g., LOL and LOLZ) SC is just as likely to be used sarcastically.

SC Texting Abbreviation SC in Texting commonly refers to the phrase Stay Cool, which is often used to encourage someone to remain calm or relaxed in a situation. It conveys a sense of reassurance and composure in communication.