So many to choose from in the Aircrew world:
OSLO - Outer Space Liaison Officer
Wigwam Teepee - because he was too tense!
Farmer - because he was very agricultural with the flying controls
ROLF - Rude Obnoxious Little F*cker
FLUFF - Flipping Lazy Useless Fat F*cker
Fluff - surname Freeman
Pumper - surname Nichol
Tug - anyone called Wilson
Brain Cell - as he had a very slow drawn out Northern accent
Uncle - the oldest looking chap on the sqn
Slider - he stank!
Cheezy - surname Cox
Sorbie - surname Hynd
Hitter (HITR) - he was an unwanted child, so stood for ‘hole in the rubber’
Bird - one of the first female fast jet pilots
Doris - another one of the first female fast jet pilots
Biffa - got a bit punchy after a beer
Flame - ginger haired
Slim - for one of the rounder flying training students
Fat Bat - resembled a large fruit bat
Hog - ate just about anything
Nerd - because he was, so Boss asked us to stop, so then called ‘Not Nerd’. Boss intervened again, so then called ‘Still’ (Not Nerd)
I could go on, but pretty much everyone had a nickname or an abbreviated version of their real name. No point in railing against it either, it only makes it worse! If I thought about it, I could probably write a book on some of the many nicknames or ‘callsigns’ as the Yanks tend to call them.