Not an erratic idle like a dirty throttle body gives you. That goes up and down when the AC compressor kicks on, and can send the idle down to 300-400 RPM and stall the engine out. Then it overshoots when the compressor cycles off.
death rattle. a sound produced by a person immediately preceding death, resulting from the passage of air through the mucus in the throat.
For other uses, see Maraca (disambiguation). Maracas ( pronunciation ), sometimes called Rumba shakers, shac-shacs, and various other names, are rattles which appear in many genres of Caribbean and Latin music. Players hold them by their handles, usually in pairs, and shake them. Maracas can't be tuned.