sus

Meaning

1. Suspicious or untrustworthy.
2. Acting in a way that suggests hidden or shady intent.

“He left the room right before the lights went out. Kind of sus.”

Where it came from

The clipped form of suspicious had circulated in slang for years before the 2018 game Among Us built its entire premise around calling out sus players. The game’s huge 2020 popularity carried the word far past gaming.