Someone who identifies as a libertarian but has a boomer mentality. Boomertarians hate everything fun and turn the younger generations such as
millennials off to
libertarianism & the Libertarian Party. They are the ones who are more likely to reject the anarchists and anything else that will actually help grow the Libertarian Party or the liberty movement. They wouldn't understand humor and satire if it hit them in the face.
This was most noticeable during the 2020 election when the Boomertarians were upset that Vermin Supreme & Spike Cohen were running on the LP ticket and
spreading joy to the youth. But since Boomertarians hate joy they drove Vermin & Spike supporters away from growing the party.