Grrr...Gaaan!Stop picking on Chen!!Phtoo, phtoo, phtoo!Have you already forgotten what I told you?!No snacks until you finish studying!SwishSwooshSuper Mad Fox
A play on 激おこぷんぷん丸 (geki oko punpun maru), a gyaru slang term, where punpun was replaced with konkon, an onomatopoeia for foxes. Gyaru subculture has a "six levels of anger" chart based off the word for being angry (怒る/okoru) which was shortened to oko. This word, which can be understood literally as "super mad and fuming all over", is the third level.
Without explaining the etymology of the others much, the other levels are "mad", "pretty mad", "seething fire", "seething inferno", and "super mad stick finality fuming dream."PeltPelt...What?