The phrase is used when someone is calling someone else (usually the person calling that person a boomer is younger then that person) really annoying or because that person being called a boomer is talking bad about the new generation.
Old person: “Alex, you’re always on phone! Please put it away.”
Alex: *laughs* “ok boomer.”
A term for the most illustrious generation of all time. Boomers are known for putting lazy, whiny, fag ass millenials in their place. When said millenials are firmly put in their place you hear a "Boom" sound. As in THAT JUST HAPPENED!
Go complain about the sunshine while wearing spandex and rainbow shoes millenials. As a boomer ill be on your girl while your protesting earthquakes
Old ass people that don’t know what a phone is but grandpa max now he’s the mega boomer
Boomer: old
Teacher:
Boomer: is an old person that was born after world war 2 because the economy was very good and wealthy that is why there called baby boomers
Student 1: they can’t turn on a tv
Reference to Baby Boomer, used in a context where something or someone is acting/behaving like they don’t know what the hell they're doing with technology
P1: aw crap, I just deleted the presentation by accident
P2: ugh, boomer. You’re such a boomer. Boomer.