An emoticon that depicts a person smirking with an eyebrow raised, like the Dreamworks face every character uses. It can mean; smugness, scoffing at another's comment, or a self-satisfied patronizing face. It can also be used when you don't know what the hell the other person is talking about. Also used for sarcasm.
Person 1:"Dude that song sucks! It's annoying as hell!"
Person 2:"What? This song is awesome."
Person 1:"Try listening to (some obscure band you've never heard of)".
Person 2: Oooooook /:J.