From The East German Judge Meaning

(humorous) Used with an imaginary low score in a competition.

Example: 1988, Linda Frye Burnham, High Performance
  The Birdman receives straight 6-figure contracts across the board except from the East German judge, who makes him pay for his own lunch and won't even validate parking.
August 2003, Tom Clancy, The Teeth of the Tiger, The Berkley Publishing Group (August 2004), p. 444:
  â€œNice pop, Aldo.” “Well, I guess a five-point-six from the East German judge. Let’s get moving.”
2007, Car and Driver (volume 52, page 72)
  The Camry interior styling and fit and finish get eights, even from the East German judge, but the Kia's pull solid nines.