The lamest smilie ever. Has no real meaning, which is why many idiots routinely use it after sentences that would otherwise convey a valid meaning. Only used by forum nerds and the even bigger forum nerds that idolize them.
1. Have a look at this website dedicated to japanese animation! :E
An emoticon conveying a facial expression in which a person smiles while inwardly curving their upper lip. Used when feeling sheepish, cute, happy, or just for amusement.