I used to hate it when I was lining up an eight-foot putt and a partner (South African) would say, ''Get it close, mate.''.Fishermen wish good luck to eachother by sayin 'tight lines,' thespians say 'break a leg,' is there a saying for golfers?
I like the ''Scottish Play'' tradition. The famous victim shares my surname.break a leg - Theatrical types are well-known for their belief in superstitions, or at least for their willingness to make a show of pretending to believe them. The term 'break a leg' appears to come from the belief that one ought not to utter the words 'good luck' to an actor. By wishing someone bad luck, it is supposed that the opposite will occur. Other superstitions are that it is bad luck to whistle in a theatre, to say the final line of a play during dress rehearsal, or to say the name of 'the Scottish Play' in a theatre's green room.
for more info http://www.phrases.org.uk/meanings/break-a-leg.html