According to an old Valentine's Day edition of the Boston Globe, it is a phrase used by cockgobblers (i.e.: Greg Fiore) when referring to their life partners (i.e: Pete DeVincent). The reference comes from the old Johnny Quest cartoon, in which Johnny has a father, Dr. Quest, but no mother... only Race Bannon. Race seemed quite happy to take care of Johnny and run errands for the good Doctor, the way a dedicated wife should.
"Greg, be a good little Race Bannon and use less teeth when giving me a blumpkin."
by Bob G. July 19, 2004