1. good luck - Noun
2. good luck - Interjection
an auspicious state resulting from favorable outcomes
an unexpected piece of good luck
a stroke of luck
Source: WordNetGood night, and good luck. Edward R. Murrow
I think we consider too much the good luck of the early bird and not enough the bad luck of the early worm. Franklin D. Roosevelt
For a long time now I have tried simply to write the best I can. Sometimes I have good luck and write better than I can. Ernest Hemingway
Good luck beats early rising. Irish Proverb
What is bad luck for one man is good luck for another. Ghana Proverb
You can give a piece of advice, but not good luck along with that. Norwegian Proverb