noun. One who or that which clacks; the clack of a mill; the clapper.

noun. A rattle used to frighten birds. See clack, n., 5.

noun. One who clacks; that which clacks; especially, the clapper of a mill.

noun. A claqueur. See Claqueur.

noun. The anus.

"We now have a "clacker," and if someone is dominating the discussion we jokingly use the clacker to remind her to behave."

Leary  absorptive  bleeding-edge  cluttering  corpse-white  

Klaxon  boiler factory  boiler room  bull-roarer  catcall  

claqueur