LAX:

You forgot one airplane, so I added it.

I also added in the popular nicknames I have heard for the various airplanes at UAL.

Since the -400 was the biggest fish, it was the Whale.

The 747-200 was considered antiquated, so "Rope-Start," which had two meanings. 1) an old lawn mower with no starter and you had to pull the rope. 2) Since Very Senior age 60+ Captains sometimes retired from the front seat back to the Engineer's Panel, it stood for "Retired Old Pilot-Engineers." (I flew the airplane at another carrier and loved it).

I think it is mostly Maintenance that calls the 777 Big Foot, due to the 6 wheels on each landing gear truck. (When I was flying the -400, many Captains called it a "Light Twin," since our gross weight was 30% higher).

The only name I ever heard for the DC-10 was "The Ten," but I'm not confident it was used widely, so I didn't post it above.

Calling the Bus "Fi-Fi" is an allusion to its (supposedly) French origins, ala a can-can girl (of dubious reputation) from the Moulin Rouge. This ignores the fact that it is arguably equal parts German and British. (And I think the girl has a heart of gold).

Since the 737 family were the smallest fish, they were the Guppy.

Since the JT8D engines on the 737-200 barely met Stage III noise requirements, they were the Thunder Guppies.