What is the definition of Isss?

Let's break down "isss" like we're cracking a particularly tricky joke. "Isss" is just a playful, misspelled take on "isso," which means "sour" or "acidic" in some languages, but more commonly it's used as a slang term to denote disappointment, frustration, or dissatisfaction. It's like when you're at a concert and the lights flicker, but instead of saying "Lights out!" you'd say "Isss!" with a sigh.

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Now, here's an edgy example: "I've been 'isss' with this app for hours, but the update just sent me into a deep, sour void of frustration – my digital soulmate, literally."