From Jaffa, an ancient port city in Israel from which the oranges were exported. The sense "impotent male" is a reference to being "seedless"; see seed. The cricketing sense, of a 'sweet ball' (from the bowler's perspective), is a metaphor further reinforced in Australian English where Jaffa is also a trademark for a popular lolly that is red and round.
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jaffa (plural jaffas)
- A type of sweet orange, normally seedless.
- (slang) An impotent or infertile male.
- (cricket) A ball that is very difficult for the batsman to hit because it moves erratically either through the air or off the pitch