1 definition by Birthday boy

Top Definition
The period during the aftermath of your anniversary upon which you realise that you are once again ordinary. Just another day of time, just so happening to mark your date of birth on an annual scale on the Gregorian Calendar. Ill feelings of trepidation and longing for the past are symptoms. Everyone gets post birthday depression once a year, unless you are born on February 29 and get it once every four years.
Abigail had post birthday depression after her birthday, so I proceed in making her cum.
by Birthday boy October 16, 2008
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