Corker

[FredPuli43]

What a corker! A corking result! What has cork to do with these, somewhat demoded, expressions?

[factor-fiction]

I cricket a great delivery is called a 'jaffa'. I'll have to look them up

[factor-fiction]

http://www.phrases.org.uk/bulletin_board/5/messages/996.html

[jno]

the cork's the last thing to go on a bottle. In boxing a corker was a knockout, the last thing in a fight. So a corker is someone who's a knockout.