proxy beef 

When you have beef with someone on someone else's behalf.

Allison has a proxy beef with Zoey because she went down on her friend Caitlin's boyfriend at Coachella behind a bush.

proxy beef by CristianoD January 24, 2017

proxy beef 

when u hate someone because your friend hates them

Linda: i hate that bitch sally bc she slept with my ex
Susan: omg in that case, i hate her too and now we have proxy beef

proxy beef by Coolcat11:11 April 18, 2023