It's a term I refuse to acknowledge, and I will double down now that I've seen the tweet about someone doing it because they thought it was funny. Just like pronouncing gif as jif because the creator thinks it's funny is a retarded, so is this.
This term does nothing but highlight how fucking stupid, or at least misinformed, so many people are. Boomer is short for Baby Boomer, named for the post-war baby boom.
The people who gave rise to the misuse of Boomer are the fools on sites like Reddit that hear the word used in some sort of economic discussion and use it thinking they're smart, with the irony being that if they had a fucking brain in their nut they'd have googled the term before using it willy nilly, but perhaps I'm asking too much of the communities that are glued to the internet to think they might use it to understand what the words that come out of their mouths.
So no, I won't be using a shit name rooted in idiocy and amplified by some dude's shit sense of humour. Maybe if it was ignorant to how stupid and annoying it all is I wouldn't mind.