Sometimes during instant messaging, people will want to express an action, possibly something where an acronym doesn't exist for, yet. They will type something like:
:: hugs ::
::jumps for joy::
The formula is generally opened by two colons, an action-description, and then closed by two colons. (:: action-description ::).
They will type something like:
:: hugs ::
::jumps for joy::
What is the name for this and where did it come from?