An emoticon used when you're in a state of confusion (when you're confused)
Person A: DUDE WHY DID YOU EAT MY NOSE?!
Person B: Wha-?!
Person C: I DIDN'T!
Person B: ?!?!?!
Person C: WHO ARE YOU?!?!?!
Person A: APPLES!
Person B: <_>
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Person A: Hey pass me the salt
Johnny: Oka-
Person C: DON'T PASS HIM THE SALT JOHNNY! >:O
Person A: pwetty pweaze?
Johnny: Fin-
Person C: DON'T! Shut up Person A!
Person A: C'mon :|
Person C: NO!!!!
Person B: <_>
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.