FAIRYTALE OF NEW YORK

I really like this song but there are a two lines I do not quite understand (English is not my mother tongue) Can anyone help me explain the meaning of the following lines?

("..And I turned my face away And dreamed about you) GOT ON A LUCKY ONE CAME IN EIGHTEEN TO ONE" ...

Ulli

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Lots of Pogues Lyrics at http://www.pogues.com/

(Look under "Discography")