Opposite of an anniversary. It's the day you either celebrate (or mourn, depending on your outlook of the situation) the ending of a relationship. Causes of celebration include the end of a marriage from a cheating whore. Causes of mourning is when the relationship ends abruptly and you didn't want it to.
January 30 is my endiversary from my ex-wife! It's going to be a great day! We'll all go out and get hammered to celebrate!
by superslacker87 May 29, 2009
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