Top Definition
Cardiff Troyster is a gambling term for a person who is incredibly good and/or lucky.
They are always in front of the game whatever that may be and always have plenty of cash from winning
'Can you believe Mark again!? He came here with $100 and 30minutes later he is winning over $1000, that guy is a Cardiff Troyster'

'I saw a guy in the casino last night who was an all round Cardiff Troyster, he won on everything he played'
by GamblersRamblers December 30, 2013

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