I refer to Singapore GP’s as Singapore 1, 2, 3 & 4
I think if we’re going to have a lexicon thread, everyone should actually explain why they use certain words and phrases. Perhaps your example is obvious to others, but it isn’t to me!
I don’t think I have any F1-related ones myself, though my brother and I did used to refer to “the fat controller” and “the thin controller” to distinguish between the remote controls for our TV and our cable box, when we both still lived at home. Because one was fat and one was thin.