sprinkler

noun

1. Anything that sprinkles.
2. An irrigation device that sprays water into the air whilst moving back and forth.
3. A heat-activated device that sprays water in the event of a fire, usually mounted on a ceiling.
4. A dance move in which the dancer places one hand on the head behind the ear, with elbow bent, stretches the other arm forwards and mimics the motions of an irrigation sprinkler with a rotary head.

verb

1. (transitive)To fit with automatic sprinklers for fire prevention.