Hmm, I lived in an old U.S.S.R. for a bit over 18 years and never heard that saying.
Well, I got it (on good authority) from Sergei -- whose family my S.O.'s church sponsored when they emigrated to the U.S. fleeing religious persecution. He was from Novosobrisk? (down by the Black Sea) and wife and mother of the 3 boys was from more like up in the 'Taiga' direction. So, I really don't have 'first-hand' info....
First names, only -- one day Sergei and I were in the back yard of S.O.'s city neighborhood home when the UPS truck drove-by. Sergei ducked behind the picnic table and I said, "what's up?" He pointed to the truck and whispered...."KGB".
h34r: