Top Definition
The date you start liking a guy you buy a bottle of milk and you have untill the milk goes off to do something about it otherwise his fair game for everybody else!
someone started likeing someone on the 5th of Feb and bought a bottle milk that day on the 15th when it went off she hadn't done anything about it so the milk bottle rule says that the guy is fair game to everyone else
by milk bar February 01, 2010
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