knob

Universal Words noun 1 a round switch on a machine such as a television that you use to turn it on and off, etc: the volume control knob 2 a round handle on a door or a drawer 3 a round lump on the surface or end of sth 4 (especially BrE) a small lump of sth such as butter 5 (BrE, !!!, slang) a PENIS IDIOMS with knobs on (BrE, slang) used to say that sth is a more complicated version of what you mention: It isn't art-it's just a horror movie with knobs on!