People or things that boom; specifically, members of the baby boomer generation born after World War II, or animals/plants that thrive during boom periods.
From 'boom' + '-er' (suffix for agents/people who do something). The generational meaning emerged in the 1960s as the large post-WWII birth cohort developed distinctive characteristics and culture.
The term 'baby boomers' is fascinating because it combined economic boom (prosperity after WWII) with biological boom (population explosion)—one word captured both the economic and demographic phenomena perfectly!
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