A sus kid or often interpreted as a "quiet kid". They're the most evil people you could ever meet even though it doesn't seem like it. Therefore, they should never be trusted. They lack attention at school so nobody knows their presents or knows what their planning to do. You might think they have social anxiety but they're really sociopaths. Usually Never speaks to anyone at school because he/she hates everyone. Gets bullied by their peers but hold their anger in. A very HUGE introvert and often works alone, weird as fuck, sits alone at lunch, fake their kindness to people, usually an atheist, and they are often white people. Have a lack of interest of making new friends. Little do you know, these sus kids might seem really nice at first but once they strike, you'll see how dangerous they are. They've held their emotions/anger which makes them create a whole outrage or massacre. Sus kids often escalates into becoming a "school shooter".
Popular kid: "Yo that kid in the back of the class is quiet as hell."
Another popular kid: "Don't be thinkin' he innocent."
Popular kid: "Why?"

Another popular kid: "He's the sus kid, get away from him."
by XXXPussySlayer April 23, 2019
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Sus kid is a kid that plays among us with other kids and likes to say sus a lot.
Damn bro, that kid is such a Sus kid!!1!!!!1!
by RandomJoeOnTheInternet January 12, 2022
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