I was reading this post about the Tildes hierarchical tag system and it got me thinking about possible tags with double meanings.

For example, the gooning tag could be interpreted in a sexual way, or interpreted as the act of being a goon/villain. To clear up the misunderstanding, you could make a gooning.baddies tag, but that also has a double meaning.

What are some tags that could be used for serious topics that can have a less serious interpretation?

Just curiosity as I idly work through details on a project that has a larger "opening" cast than usual. I have a lot of ways I come up with characters and flesh them out (just write them, make them in dress-up games and the like, build them up in daydreams, etc.), but I'm curious about other people's methods.

So, how do you flesh out characters?