Sloppy joes have utterly different meanings in America as in Australia. In America, they are (obviously!) drippy meat sandwiches that make a huge mess. In Australia, they are (shock! horror!) a sort of sweater along the lines of track suit material, but not wool.
Either that or one of my co-workers has a family with very creative names for their clothing.
I'm not quite sure which. Any other Australians want to back her up on this one?