OTOH, just guessing, it could have been a name given by some or many Russian pilots.http://www.warbirdforum.com/russp40.htm
Golodnikov: "Well, that what Allies [British and American pilots] thought, that it is not wise or almost impossible fight with P-40, I knew all the time during the war. P-40 was thought of as quite good fighter with us. When we started to use P-40, we immidiatelly find two drawbacks that were reducing its value of a fighter:
1. P-40 was "dull" in acceleration; it would accelerate quite slow. Poor acceleration dynamics resulted in the low combat speed. It was hard to obtain speed necessary for the air combat. Speed is ultimate thing for a fighter.
2. Poor vertical, especially Tomahawk.
All the summaries regarding the P-40E have a pessimistic tone (insufficient speed and maneuverability, high weight, weak engine), and the conclusions are the same: the aircraft was suitable only for PVO aviation.
It is true that initially the pilots attempted to improve its flight characteristics, primarily by using "war emergency power" during battle. They did this intuitively - if Soviet engines at maximum power roared like beasts, then the Allison only changed its tone slightly and everything seemed normal. The payment came due quickly, however. At "war emergency power" (all of 10 minutes with the Allison engine) the engine quickly wore out and the power fell off markedly. As a result (according to reports from the regiment engineer), over a period of a month the maximum speed of the Kittyhawks did not exceed 350 - 400 kmh. The regiment got rid of them at the first opportunity -