Oh, that did take me a long minute to understand.
The NATO designation for the Soviet MiG 21 supersonic fighter is "Fishbed".
Just to expand on that a little without derailing the thread, NATO designations for fighters all began with an "F" (such as Fresco, Farmer, Fishbed, Flogger, Fitter, Frogfoot, Fencer, Foxbat, Fulcrum, Flanker), while bomber designations, began with a "B" (such as Beagle, Bear, Badger, Blinder, Backfire, Blackjack).
This was a new take on the system used to label Japanese aircraft in WW2. Back then, fighters had male nicknames (such as Claude, Nate, Oscar, Zeke, Tony, Jack, Frank, George), while bombers had female nicknames (such as Val, Kate, Betty, Judy, Jill, Dinah, Nell, Emily).
I know a lotta mostly worthless stuff.