More like “nice-in-quotation-marks”. Maybe “polite” would have been a better word. They smile bigger – exaggerated and insincere. They try to satisfy whatever you’re wanting so they can conclude the interaction as quickly as possible. They keep an air of superior self-righteousness while being nice… defensively.

Mind you, I do even put “polite” in quotes on purpose. The more stuck-up folks can very “politely” cut you straight off at the knees in a way that preserves some semblance of plausible deniability where poorer folks (on average, very much a generalization) may be more real/authentic in general and can be more direct about calling you an asshole.