LOL, Mr. Webster at your service (didn't I just see a 'bike slang' thread?)

1) a dancing girl at an 'adult entertainment establishment', typically in an elevated location.
2) a motorist, the 'cage' being the rolling steel box they call a 'vehicle'

(the term 'cager' is used as an insult, eg: "that bleepin' cager just buzzed me")

So... how was your commute, today?