SIS

What Does SIS Mean?

SIS means "Sister."

"Cyber Speak" Test

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Summary of Key Points

"Sister" is the most common definition for SIS on Snapchat, WhatsApp, Facebook, Twitter, Instagram, and TikTok.
SIS
Definition:Sister
Type:Abbreviation
Guessability:
1: Easy to guess
Typical Users:
Adults and Teenagers

Example of SIS Used in a Text

SIS

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