{:

'{:' is mainly used to express ':}', just backwards.
It is used by a lesser crowd than ':}', but still has the same effect.
'{:' is mainly used online while chatting.

MSN (etc.) conversation:

Guy: I must be a raindrop, because I'm falling for you.
Girl: Aww. :')
Guy: {:

by Allie:3 December 26, 2011