Australian slang, nmeaning a beer. Derived from the frothy head of a newly poured glass of beer.
1. Geez, I reckon we could both do with an icey sherbet, hey Bruce?
2. Christ Almighty, I could knock the fuckin' head off an ice cold sherbet, right about now.
1) A delicious, frozen, fruity treat.
2) A gay man.
1) "Raspberry sherbet for me please!"
2) "Man, what a fucking sherbet."