I don’t use Yahoo Messenger a lot, but one of my friend wanted to talk to me on Yahoo as his MSN meseenger was not connecting. While chatting with him I mistyped a word and it appeared in an emoticon of a skull. I was really surprised to see this. Then I searched a bit more about it and found that there are some hidden emoticons in Yahoo! Messenger which does not appears in the emoticon menu, but only by typing the symbols directly into an instant message.

Check more about it at http://messenger.yahoo.com/hiddenemoticons.php

I might start using Yahoo Messenger because of these cool emoticons. :p