At what point does a nickname for an aircraft become official?

[Frankie]

From: http://web.mit.edu/btyung/www/nickname.html

Begs the question. Most of the nicknames are obvious and apt, but at what point does a nickname for an aircraft become official or become part of the airforce lexicon/slang? I mean does the Airforce Chief ask his grandson,
"What does a Vertol CH-21 Workhorse look like to you, Junior?"
      'Looks like a banana, Grandpa'
"You're kidding me!"
      'No honest, Grandpa, it does! Look at it!'
"Well I'll be danged! You're right! Write that down Adjutant!"

Aardvark

General Dynamics F-111

Angel

Lockheed U-2

Banjo

McDonnell F2H Banshee

Catfish

Sikorsky UH-60 Blackhawk

Chipmunk

Boeing RC-135C

Crane

Sykorsky CH-54 Tarhe

Fat Albert

Lockheed C-130 Hercules

Flying Banana

Vertol CH-21 Workhorse

Olive on a toothpick

Hughes OH-6 Cayuse

Flying Eggbeater

Sikorsky R-4 Hoverfly

Skooter

Douglas A-4 Skyhawk

Sluf - Short, little ugly fellah (polite)

LTV A-7 Corsair II


Tadpole

Grumman A-6 Intruder

Tennis Court

McDonnell Douglas F-15 Eagle

World's Largest Dog Whistle

Cessna T-37

[Asid]

Great post Frankie.