BOOMERS

A person born in the postwar years (generally considered in the United States and other Allied countries as between 1946 and the early 1960s), when there was a marked increase in birthrates throughout the Western world following the return of servicemen at the end of World War II.

An adult male kangaroo.

(by extension) A person who does not know how to utilize new technologies well.

"I'm such a boomer; I have no idea how to use this phone."

Something that makes a booming sound.