Artillery designed to shoot upward at airplanes
English: antiaircraft, antiaircraft gun, flak, flack, pom-pom, ack-ack, ack-ack gun
pom-pomEnglish
pom-pom, ack-ack, ack-ack gun, antiaircraft, antiaircraft gun
Noun
Decoration consisting of a ball of tufted wool or silk, usually worn on a hat
English: pompon, pom-pom