In this instruction, you will find out how to use the hidden Skype smileys and emoticons. You can not find this smileys in the standard Skype smiley menu. To use these smileys you need to memorize some words and put them in parentheses (). These words you can find in table below. There are 15 hidden Skype smileys. Also, there are a lot of flag emoticons, which you can get by typing flag, colon and international country code in parentheses, e.g. (flag:us) or (flag:uk).
Here is the table of secret words.