Been in the shipyards over 40 years now and some of the nicknames are brilliant, some too rude for a website sadly.
However, here's a few and why there were called that (if I can remember).
Nala (actually Alan but he was a bit backward)
The Dumpling (just a bit stupid really)
Pling (an apprentice who was only half as smart as The Dumpling).
Nail in his boot (a guy with a bad limp)
The Great Voltaine (used to give magic shows on the ships)
The Grizz (think Grizzly Adams... money lender)
Sonny Baboon (money lender)
Willie Two Planks (as thick as)
Hauf a Brain (self evident)
Big Funky (surname was Gibbons)
The Screaming Skull (foreman)
Torpedo Bob, who, while taking a tour of young teens on a tour of the yard and dry docks was asked what the tubes were at the bottom stern of the ship just before the rudders? Bob, who wasn't actually a shipyard man told them they were aft firing torpedo tubes.
Must have come as a surprise to the men who fitted the propellor shafts.
And my favourite of all was Bungee (Can't mention his name he's still out there)
Bungee was at a high level Project meeting and put forward the idea that instead of the drag chains which slow a ship as she goes into the water off the slips, we should use bungee cords.
The sight of a type 45 frigate going into the water for the first time is a beautiful and exciting thing, how much more exciting if 7,500 tons of steel came flying back up the slips 2 or 3 times.