the word used to illustrate unhappiness in MSN convos when no one can be bothered using the emoticon. Also can be said in real life to exaggerate or bring extra attention to a person's unhappiness. If used in real life, use is generally always sarcastic.
Totallypwnagefriend: Hey wat was with ur sadface today?
Well in maths today I pretty much got told to fuck off by the teacher and I was like 'awww, sadface. I don't care'
1) the frowning emoticon
2) a verbal expression of disappointment
2) You're not coming to the movies with us? Sadface!
An adjective used to express sadness, annoyance, dissapiontment or mild anger. Sadface as well as Angryface, Happyface etc. can be/is used to replace an emoticon
*sadface replaces >:(*
Any emotion followed by -face can be used to decribe how you're feeling.
*I accidentally killed my pet fish. sadface.
*What!? I got an F on my english test! sadface!
*Sooo, my girlfriend is definitely fucking my bestfriend. sadface.