Any racing stripes that are added to a thing in order to superficially improve the thing's performance. These are most commonly applied to cars by teenagers in ameteur car clubs. This kind of mod is often seen by outsiders as a superficial attempt to add horsepower.
Go-faster stripes can be added to make anything at least look like it's going faster. This is often suggested for computers, but can apply to anything that has some kind of time variance. You could put them on your cat, your microwave oven, even your Nikes. It is important to note that it is not necessay for the object to have wheels or be mobile. Adding a spoiler has the same effect.
Note: adding Go-faster stripes to a clock may have unpredictable results.