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1.
>=O
Rawr-face, used to express anger, unpleasent shock, or yelling.

Typically used as a sentence-suffix in chat-rooms and forums.
demon-guy2523782: OMFG, i b teh 7331!!1!
Guisedge: STFU! >=O

~
Guisedge: You mean they DIDN'T have '>=O' in urbandictionary.com?! >=O
by Guisedge October 29, 2004
 
2.
Emoticon for evil, mischievous, grin.
Optimus Prime: Want to play a prank on Lou?
Christopher: >=o)
by Christopher Frame June 05, 2006