Sorry...left that part out. If you say it to someone, or someone reads it when you write it, then you steal that persons luck for the day/month.
AH HAHAHAHAHA!! So everyone that has looked at this thread, commented, and the like, I've stolen your luck! Sorry.
You can get it back by either continueing the viscious cycle by saying it to someone else and stealing their luck. Or saying Tibbar Tibbar before you go to bed!