Grinding my gears as far as I know, and figuratively, you say this when someone pisses you off right? anyway, I would like if you are a native speaker to give me a few examples so I can understand it more, also I would like to know where did this expression come from? american expressions sometimes don't make sense to me , I like to search for the literal meaning too so I can memorize the expression and know where did it come from, thanks in advance:)