A put-down used to tell an ignorant or closed-minded person of the baby-boomer generation that you do not respect their opinion because it's built on misinformation or ignorance so great that it's unreasonable to try and undo it all in the current conversation. Typically, one who uses this phrase does so because they realise that the person they're talking to would not be willing or able to enter a reasonable discussion about their misinformed opinion.
Boomer: "You millennials are so lazy, you think you're entitled to an easy life. You don't know how the world really works. By the time I was your age I'd paid off my mortgage because I worked hard."
Millennial: "OK boomer"
Millennial: "OK boomer"
by Pablo Guardo February 26, 2020

by memelord_69,420 March 5, 2020

OK boomer is an internet slang phrase used, often in a humorous or ironic manner, to call out or dismiss people that are close-minded or people that don't understand your humour or point. A boomer is often described as an older person with the trouble of understanding newer culture and humour
by Dickmeister6969 November 19, 2019

when a baby boomer makes a solid point and a dumbfuck gen z has nothing to say in defense, they say "ok boomer"
this phrase also marks the peak of the generation z ignorance
this phrase also marks the peak of the generation z ignorance
boomer: My generation went to war, your generation can't even decide what their gender is.
gen z retard: ok boomer
gen z retard: ok boomer
by boobmuffin November 15, 2019

by okb00mer December 5, 2019

by xdRadley November 13, 2019

Person 1: What did you get for your exam
Person 2: I got 40/40.
Person 1: Ok Boomer
Person 2: Narrr, you would say that.
Person 2: I got 40/40.
Person 1: Ok Boomer
Person 2: Narrr, you would say that.
by Sha little Dominator! February 16, 2020
