Huckleberry

I don't know what being a huckleberry means in slang. Yes I heard it in TOMBSTONE but what about in CON AIR when the loser in the bar at the beginning of the movie,called Nicolas Cage Captain Huckleberry in the middle of insult.

The loser said to Mr Cage's character, throwing money at him to go buy him and his friends a round of beer. The loser ask the wife character who is your Captain Huckleberry