- Jo is a Scottish term for sweetheart.
An example of a jo is a reference to a dear friend in a Robert Burns poem.
He might call her jo.
jo definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
noun pl. joes
Scot. a sweetheart
Origin: variant, variety of joy
jo definition by American Heritage Dictionary
noun pl. joes joes Scots
Origin: Alteration of joy.
Jordan (in Internet addresses)