Off the top of my head:
Almost all fighters have been referred to as "lawn darts"
F-111_ "Switch-blade edsel", "Aardvark", "Pig" (because of long nose)
EF-111_"Spark Vark"
A-10_"Hawg", "Sandy"
F-4_"Rhino", "Double Ugly"
F-16_"Viper", "Electric Jet"
T-37_"Tweety Bird" or "Tweet", "6000lb Dog Whistle", "Noise Converter" (coverts JP-4 to noise)
F-105_"Thud"
B-1B_"Bone" (BTW the second "B" stands for broke...ask a B-1 crew chief sometime)
B-52_ "BUFF" (Big Ugly Fat Fellow)
F-102_"Deuce"
F-104_"Missle With a Man in it"
F-15A/C/D_"Light Greys"
F-15E_"Dark Greys", "Mudhen"
A-4_"Scooter", "Heineman's Hotrod"
A-1_"Spad", "Flying Dumptruck", "Sandy"
A-1E_Same as A-1 plus "Round Face"
A-7_"SLUF" (Short Little Ugly Fellow)
C-124_"Old Shakey"
C-130_"Herk"
C-130A_"Roman Nose"
HC-130_"King"
SR-71_"Habu"
AC-119_"Stinger", "Spooky"
AC-47_"Puff The Magic Dragon", or simply "Puff"
AC-130_"Spectre"
C-5_"FRED" (Fat Ridiculous Elongated Disaster), "Pavement Pig"
C-141B_"Leaping Lizard"
UV-18_"Twotter"
KC-135_"Toad"
CH-46E_"Phrog"
H-21_"Flying Banana"
MH-6_"Little Bird"
AH-6_"Little Bird", "Killer Egg"
HH-3_"Jolly Green Giant", "Jolly"
HH-53_"Super Jolly"
MH-53_"Pave Low", "Pave Pig"
HH-43_"Husky", "Pedro"
C-177_"Gutlass"
BTW, The F-20 was NORTHROPS biggest mistake not the USAF's, since the USAF never bought them. Northrop's offer to compete with the F-16 for an export fighter. Their thought was that since so many counties operated the F-5, they would offer a similar airframe with the upgrades of the F-20. Yeager liked them.
Fingers are numb now,
Sal