look up any word, like sweetest day:
 
3.
When someone says something upsetting you'll say sad days. Things that make you sad -sad days.
I can't come over - aww sad days
I miss you. I'm having sad days here!
by sexyrussianspy November 27, 2010
 
1.
A term used when something is not going the way you want it to.
"Someone ate all the ice cream...sad day..."
by Mich Hawaii April 30, 2006
 
2.
A phrase that is orally announced when things are not going the way that one expected it to be going. The origin of this phrase surfaced somewhere in the southwest Bakersfield, California area.
"Crap! I just broke my brand new drum sticks...sad day!"

Frank: "Wow, Gabe. That song you wrote is gay."
Gabe: "Aw, sad day."
by Gabe Fierro February 13, 2010
 
4.
When one has run out of cannabis.
Person 1: "Dude, i just smoked my last bowl, and i'm outta money for at least a week :("
Person 2: "sad days, bro. sad days"
by Heavy Metal \m/ August 24, 2009