I was referring to manual transmissions, I probably should've specified.
Are overshift and undershift actual words? Because that would sound fitting. It seems people use it sometimes but mostly just for changing gears to lower or higher in general.
I'm asking because when I drove on the highway and through the city yesterday, I deliberately used a lower gear for most of the drive just to hear the engine some more and have some stronger acceleration just because. Even though the car eats gas like a battle tank when I do that.