A derogatory term used to describe those who feel the need to make themselves appear very sad, depressed, and whiney almost 100 percent of the time.
These people tend to wear too much black, ugly patterns from the 80s, and flat shoes. The females tend to have eating disorders and like to post pictures of themselves in underwear on MySpace. The males tend to love to give sexual favors to other males in the hopes that it will either A) attract him more scemo girls or B) ...just get some peen.
Now, the origin of this word is derived from the North American slang words of "scene" and "emo".
"Why is Sally always crying and making up lies about how her parents hit her?"