When someone uses the retarded smiley (xD) in an IM or any other form of internet communication, one should respond with "P33N3D." If the person who sent it types "P33N3D" before the other person(s) involved, they win at life. If another person types "P33N3D" before the user of the smiley does, the user has been PWNED and is now the other person's bitch.
(The first person wins at life.)
(The first person is now the second's bitch.)