That can be frustrating and/or embarrassing, but it's no problem! You came to the right place
to find out what SIS means.|
"Snickering In Silence"
PS. We shorten and abbreviate words and sentences everywhere these days. Above we answered, What does SIS mean in texting? The question could also
be: What does SIS mean on Facebook? What does SIS mean on Twitter? What does SIS mean on Instagram? What does SIS mean in email?
You get the point. We abbreviate and use SIS not only in texting, but on all the social media sites and through other digital communication.