The story
From baby + boomer, or from baby boom + -er, when there was a marked increase in birthrates throughout the Western world following the return of servicemen at the end of World War II.
Etymology from Wiktionary, CC BY-SA 4.0.
baby boomer
Today it means: A person born in the postwar years, generally considered in the United States and other Allied countries as between 1946 and 1964. Full definition →