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When an internet user, regardless of age, posts comments and/or memes poking fun at behaviors and trends which are commonly perceived as unique to millennial (this is in reference to the pseudo-feud between baby-boomers and millennial). These posts, when made by baby-boomers, are typically a way of voicing some level of concern and/or contempt for what they consider "typical millennial" behavior. When posted by other millennials, they are typically a way of that person showing contempt for his/her own generation.
Person A: *posts a picture of a revolver captioned "Fidget spinner... For men"*
Person B: Wow, what a boomerpost!
by ( ͡° ͜ʖ ͡*) August 26, 2017
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