Ok but “bug” has multiple meanings, and almost nobody means “hemiptera” when they say it. More commonly, it’s any terrestrial arthropod. Arachnids are bugs. Centipedes are definitely bugs.

Heck, there’s a broader definition that basically includes all arthropods. “Moreton bay bugs” are a popular food this time of year. And they’re a kind of lobster.

uh, slugs are bugs! any non-vertibrate animal is a bug

uh, slugs are bugs

I’mma be honest, I would not instinctively agree with this.

I would. I think that just goes to show how informal and unworthy of policing the term is. We even call viruses bugs a lot of the time.
yeah, i would say “a bug is something that annoys you” so a virus could maybe be perceived as a bug as well, though i also would like to point out that “annoy” does not mean “i don’t like it”. it’s like doing sports, it can be painful but also very fun