Playing 5D Chess
suspiciously trying to deceive one or more people in layers of deceit, either on purpose or suspected by someone.
John: Steve is totally acting sus, he knows we suspect him but what if he's trying to look guilty on purpose so we don't think it's him, but then that would be a reason to think it's him.
Hank: I agree, Steve is seriously Playing 5D Chess with us.
Hank: I agree, Steve is seriously Playing 5D Chess with us.