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1.
>o<
An emoticon of one yelling. The > < represent the closed tight eyes, generally, the o being the mouth. >o< and >O<, with differing capitilization of the o, represents different volumes of yelling.

In addition to adding energy to a sentence, it can be used to represent sarcastic overenthusiasm.
Serious;
coolj: You guys shut up for a minute and think >O<
Sarcastic;
bobbyk: I just got a new bike
ffingerlick: thats amazing i am horny because of that news >o<
by Vee Are Are Schee May 24, 2006