:3 is a cat face. Used as a sort of cutesy or shy smile, playful or bashful. In real life it would be expressed with a slight, coquettish pursing of the lips.
"Did you get the new picture I sent you? :3" (colon three)
by DaystarEld January 21, 2012
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Word version of the smiley :3
its pretty much a hamster face,sort of a butt mouth.
You use the when your happy,blissful,peaceful,etc.
by maddiechan December 18, 2006
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:3 represents two arms covering the mouth, as in, "I'm playfully hiding from what I said.." It is both confidence and submission to the audience.

"we should hang out tomorrow :3" implies that the comment was playful and not completely serious.
by kujua June 23, 2011
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Word version of a mustache face. 3:
Used when representing someone who has a mustache.
Dude, this guy had an awesome mustache! 3: Three Colon
by MegaDude101 May 30, 2011
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