[header] How to respond to someone body shaming another person [title] Identify body shaming. [step] If you hear people gossiping about someone's who's not there, nip the talk in the bud. They're not there to defend themselves, and you are. 
Plus, the more body shaming talk you let slip by, the more likely people are to do it when you're not around. [substeps] You could say something like, " hey, that's not cool.