You say this in response to something someone tells you that isn't true nevertheless they want you to believe what it is they're lying about.
Him: Even though I clearly said Millennial, I am not a millennial. I honestly just have a foot-up-the-nose disorder. It's a very serious medical condition.
The best response a Boomer or (Non-Boomer) can use when the trite "Okay Boomer" meme is thrown at them for insult. Can be used whether target is male or female.
This is a phrase used to agree to somebody's suggestion because you do not want to argue (much like the phrase: "Whatever you say"). However, when you think about it, it literally makes zero sense.