nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqr0uge0tynet70cr50xtjwhn2gfn76988eanv7l0j9edn0rjvnclsjelneq That explains why some people like it, but not why it's called a "mullet".

I've seen the word used for a type of haircut, and I think there's a fish (checking wikipedia, there are quite a few different fish called that) but nothing that would explain its use for bikes. None of the other mullets in the wikipedia disambiguation seems related (and the bike use isn't there).