“Sheesh” has been common slang for years, but the elongated reaction became especially visible in short-form videos during the 2020 to 2021 TikTok wave. Creators used it as a vocal reaction to hype up fits, sports plays, game moments and exaggerated reveals. Its spread came from how easy it was to recognize, imitate and drop into edits. The sound remains popular because it can signal praise, disbelief or secondhand embarrassment with the same single word, depending on the timing.