Definition & Meaning of "sketchy"in English

What does "sketchy" mean in trust and safety slang?

The term "sketchy" describes something or someone that seems suspicious, unsafe, or unreliable. The structure is an informal adjective derived from "sketch," implying something incomplete or unclear, used metaphorically to signal lack of trustworthiness. It is commonly used in everyday and online contexts to describe situations, places, or behavior that feel questionable or potentially risky.