Originally Posted by Thor

To add a bit more context, the “Mainliner” was a marketing trademark/service mark for United going back to at least 1937. The not so affectionate term “Marvin Mainliner” predates “pathetic Kool Aide drinker” by a lot. Mocking the idiot as a “Marvin” who won’t start the APU on a hot day is part of your work DNA.