Airforce pilots are famous to rename or "nickname" their airplanes. That where the Jug and Warthog comes from.

Plane Assigned Name Nickname
F4 Phantom Double Ugly
T-37 Tweety Bird
T-38 Talon White Rocket
F-16 Fighting Falcon Viper (either snakes or Battlestar Galactica )
F-15 Eagle Eagle They must have liked the original name
F-105 Thunderchief Thud
f-117 nighthawk Wobblin' Goblin

More here:
https://web.mit.edu/btyung/www/nickname.html