Smiley
Using ascii characters to represent a face or emotion. Smileys
are ususlly used in email messages or in chat.
Some basic examples:
:) is a smile
:( is a frown
:P has a lolling tongue
;) is wiking
B) has sunglasses
:-) has a nose
...there are a lot of possibilities, people are very good at interpreting pictures as faces. See Ascii Art, maybe Electronic communications, Emote, or Emoticon.