Nervensaege

While in English that bratty little neighbor kid just gets on your nerves, in German he saws right through them. Anything that's really annoying can be called a "Nervensaege" (literally, "nerve saw"). Come to think of it, chain saws can be pretty annoying themselves, especially if the bratty neighbor kid's father is using one to trim the hedge at 7 a.m. on a Saturday morning.