The first day that hunting season legally opens within a states boundaries for deers to be killed via modern gun, muzzleloader, archery, etc.
My Dad and I don't celebrate Christmas or our birthdays but you better believe it that when Deer Day comes around this year we'll be out blowing away Bambi's dad and celebrating with some tasty Budweiser's at the local watering hole afterwards.
A day when everything is hectic and goes wrong, when your coffee spills, your boss tells you to stay overtime, your teacher gives you extra homework or you fail a test and you feel anxious.
Person 1: Hi how's it going?
Person 2: shit not so good this day is crazy..Ugh!
Person 1: having a Deezee Day I see.
Person 2: yeah man everything is going wrong, I'm done with this.
when you are so monged out that the rest of the day is completely non-existant. when your in so deep from drink/drugs that there is no coming back for the remainder of the day.