That's hysterical! (geddit?) But more seriously, there's a number of words like that, IIUC. E.g. cretin, barbarian, slave, hysterical, lesbian. Probably other

That's hysterical! (geddit?) But more seriously, there's a number of words like that, IIUC. E.g. cretin, barbarian, slave, hysterical, lesbian. Probably other terms as well, I'm guessing. I'm not sure it's worth getting too worked up about the original usages of those terms, if most people using them aren't making the connection.