Liberal protesters, often anti-war, anti-Bush, anti-capitalism, etc. They often get the police involved due to destructive behavior, and the police sometimes use a
gun that shoots beanbags, as a crowd control weapon.
The term is a fitting rebuttal to liberals who call conservative protesters "teabaggers" for attending anti-big
government "
tea parties".
"Did you
see those beanbaggers at the G20
Summit? What a bunch of animals".
"
Conservatives are peaceful "teabaggers" but liberal beanbaggers behave like animals.