Ok Boomer

A way of humouring old people without humouring them, much like "Ok Granddad", but with the added context of "Your opinion is vile, but I appreciate it can't be changed. Soon you will die, and there will be one less person in the world with that view point. And the world will be better for it."

Baby Boomer (while having free education and a society that allowed mobility) : Your Generation just doesn't know how to work hard. No-one gave me a hand out!

Millenial : Ok Boomer.