One's online name. Often, a hacker will use a handle, and will be referred to by this handle by all his associates, to help lessen the chances of his getting caught. Also, often a privacy measure.
financial (and increasingly general language) slang suffix used to imply an approximation, similar to -ish.
I can't believe Citi stock is trading at a 3-handle (~$3/share).
I need to stop eating those Burger King rib sticks ...I jumped on the scale last night and it showed a 2-hundred-handle for my weight. (relevant for someone who is typically less than 200 lbs).