A half bare left behind alcohol, generally left by someone with a new beer. When a chap you love cheats you simply when you feel secure, he's got taken a Beatties for you!!! Produced from the phrase "Bitty" however this defines a girl that has been beat using unsightly stick. "Beatty" is actually used to explain an ugly bitch. They have a tendency to be friends with bitties, in truth these are typically only kept around to really make the real bitties look better.