Proverbs regarding (malicious) fooling, jesting, joking, kidding, spoofing, teasing, tricking
Fools mock at reparation, but among the upright there is favor.
Prov. 14:9 (read whole chapter)
Like a madman who shoots firebrands and deadly arrows,
so is a person who deceives his neighbor, and says, "Was I not only joking?"
Prov. 26:18-19 (read whole chapter)