ayday is just another word for "everyday". it can be used in place of the word "everyday" in any sentence.
by the 0ne January 22, 2009
a celebration of the last "Ay" of the week, it being "ay" due to a mispronounciation of "day" Ay day is celebrated on the top of a roof of any building with a can of soda. It is required that you be sitting in a chair, preferrably a lawn chair.Once everyone is nestled comfortably in their seats on the roof, you count down from three to 1 and then say "this is Ay-day" then open your sodas simutaniously evrey diffrent week one must drink a diffrent brand of soda
by silas p July 02, 2005