Sus is a shortening of suspicious or suspect. In slang, it has the sense of “questionable” or “shady.”

What is a sus in text?

If you've been on the internet lately or spent time with a teenager, you might have heard them call something “sus,” which is shorthand for “suspicious” or “suspect.” Something or someone is “sus” if it or they seem dishonest or untrustworthy.

What does kinda sus mean?

What is 'kinda sus'? Instead of expressing extreme suspicions you can express a little suspicion. For example: “Lyndsey is acting kinda sus.”. This means that someone is being rather shady instead of totally shady.