Backstory: I live round the corner from my gran and visit her often so thanks to me she has a vague grasp of what memes are and how they work. The other day when I was round at hers and she asked what memes were popular at the moment so I told her about the "OK boomer" meme. She knew what boomers were already so she was able to get the concept of this meme fairly easily.
Fast forward to today, I'm over at my gran's again, and she's on the phone to my aunt. They got into a disagreement over a slightly racist comment my aunt made the other day (my gran is very much against racism) and my gran eventually just said "OK boomer" and hung up.
I've never been so proud.
UPDATE: So I told my gran about this post and the reaction it got - she said she's glad that so many of you enjoyed her little joke and that it proves she's still young at heart. I agree with that 100%.

𝓜𝔂 𝓭𝓮𝓪𝓻𝓮𝓼𝓽 𝓫𝓻𝓸𝓽𝓱𝓮𝓻, 𝓽𝓸𝓭𝓪𝔂 𝓶𝓪𝓻𝓴𝓼 𝓽𝓱𝓮 8𝓽𝓱 𝔂𝓮𝓪𝓻 𝔀𝓮 𝓱𝓪𝓿𝓮 𝓱𝓪𝓭 𝔀𝓲𝓽𝓱𝓸𝓾𝓽 𝓿𝓪𝓻𝓲𝓮𝓽𝔂. 𝓦𝓮 𝓶𝓪𝔂 𝓷𝓸𝓽 𝓫𝓮 𝓪𝓫𝓵𝓮 𝓽𝓸 𝓮𝓷𝓭𝓾𝓻𝓮. 𝓟𝓵𝓮𝓪𝓼𝓮 𝓹𝓻𝓪𝔂 𝓯𝓸𝓻 𝓸𝓾𝓻 𝓼𝓪𝓵𝓿𝓪𝓽𝓲𝓸𝓷. .