In what case does the definition of "bad" become subjective?

It's always subjective.

All definitions of anything is subjective.

That's a pretty unique question. The problem is it's easy to point to paradigmatic cases of "bad" being subjective (as in when someone says "that's bad" of a dish they personally dislike the flavor of) and cases of it being objective (as in when someone says "that's bad" of a wrench that fails to do anything). But the middle ground is always an area for judgment. No one can give you all the answers there, let alone easy ones.

Everything's subjective.. yet everyone seems to think they are the authority.. weird 🤘😎

Oh. Ahem. I am a good girl. I wouldn't know. Care to have that spot next to me under the blanket now? 😏

When people sit on the fence when they have to decide between right and wrong. @Tres13

in bedroom?

When comparing different cultural beliefs and norms.

I guess it is in most cases if you think about it.

Music, art, different foods or smells. And religions. And psychopaths.

when you're black and live in the hood