The noun form of the onomatopoeia “sheeeeesh!!” inciting a sense of urgency among the sayer. Often said repeatedly.
Guy 1: “Holy shit!, you’re about to hit that fucking car!”

Guy 2: “Sheeshington, sheeshington, sheeshington, sheeshington…”

Guy 1: “u- uhh- ok?”
by WrinklyKanadian November 24, 2021
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