It ain't over till (or until) the fat lady sings is a colloquialism and has been classified as a proverb. It means that one should not presume to know the outcome of an event which is still in progress. More specifically, the phrase is used when a situation is (or appears to be).
The correct expression is that; "the opera ain't over till the fat lady sings. However, the bullets' coach, Dick Motta, took up the phrase as a caution to fans for.
Dear Abby: Where did the line ``It`s not over until the fat lady sings `` line was a takeoff on Yogi Berra`s line, ``The game isn`t over till it`s over. I seriously wish my books weren't still in storage. Flags of the World. Find all posts by Dropbear. According to Chester, the black ball. New Owner Demolishes O.