Free Waterfall Jr. was the son of Free Waterfall Sr. and the head of Mankind for Ethical Animal Treatment (M.E.A.T.). He was a known "anti-eating activist".
Together with his organization, Free Waterfall Jr. fought against Fishy Joe's product of popplers. Together with "Fishy" Joseph Gilman and Turanga Leela, he debated on Date Night. Despite Leela's agreement that it was wrong to eat popplers, she didn't buy his argument that it was incorrect to eat other animals. He even threatened to boycott Fishy Joe's in vain, as his organization wouldn't have visited it anyway.