What is the definition of Ihsnet?

Let's break down 'ihsnet' like we're deciphering an ancient, cryptic code - the funny part? It's a misspelling of 'his not,' but it's like saying "He isn't" in a sarcastic tone, or "Him isn't even trying." Now, here's an edgy example sentence using it: "The janitor's not even cleaning the cafeteria, hence his not noting the mess." Talk about a darkly humorous twist!