POM-POM

I. noun Etymology: alteration of pompon Date: 1873 an ornamental ball or tuft used especially on clothing, caps, or costumes, a handheld usually brightly colored fluffy ball flourished by cheerleaders, II. noun Etymology: imitative; from the sound of its discharge Date: 1899 a multibarreled automatic antiaircraft gun of 20 to 40 millimeters mounted especially on ships