Or "Kirwood", "Kurwood", "Kurward"... From the "
Missouri Mish Mash" story arc of
The Bullwinkle Show in the mid-
60s; there was also an episode of
The Wild Wild West that used it as a jump-off point.
Punned after
television personality Durward Kirby (often spelled "Derwood" or "Durwood", which was also Endora's deliberately-wrong name for Darrin on
Bewitched), whose actual talents, beyond sidekickhood (with both Garry Moore and
Allen Funt), were unclear.
The derby turned its wearer into the smartest man in the world, so therefore it was coveted by Boris Badenov, who had plans to use that newfound smartitude for evil.