someone who always thinks about what others will think or what others will do if they do or say a certain thing.
..kinda borderline selfishness
usually alot of Scene/Emo/Depressed/Angry Teens..or people are self conscious.
*SCHOOL FOOTBALL CROWD IS CHEERING*
Boy: COME ON! CHEER FOR THE TEAM!
Girl: no..everyone will laugh at me and think i'm stupid.
Boy: YOU'RE SO SELF CONSCIOUS!