Salty Cracker

Usually someone named Kuro who thinks they know everything but often the opposite is true. This behavior often results in an obnoxious level of arrogance. The interaction usually leaves a bad taste in your mouth afterwards.

"Kuro is acting like they're right again. I looked it up. They're wrong. Again."
"Don't bring it up. Kuro will just shit-talk you."
"I know. Kuro is such a Salty Cracker."