bun fight

noun2

1. •
   (UK, slang) A formal tea party or other social gathering, especially one at which food is served.

   • [T]he cineastes […] will descend on that shabby little seaside town in the south of France for the 50th Cannes bun fight. — 1997
2. •
   A debate or disagreement, usually with several parties involved, often political in nature.

   • "Our interest in the thing is all lackadaisical, a kind of bun-fight of pet notions. There's no real steam." — 1915