1. to reply to a message (usually on a message board) by using a smiley or face.
2. To always reply with a smiley or face at the end of each message to help show the emotion behind it.
It can be annoying if you do it constantly.
1. :)/:o/XD/o_o etc.
2. Hi :(/OMG EMU PANTS O_O/You're stupid :o etc.