Ben Affleck, Matt Damon trade bitter, hilarious barbs: 'The only part recognisable of you is that big, ugly chin'

Matt Damon doesn't just feud with arch-nemesis Jimmy Kimmel. He has beef with his lifelong pal Ben Affleck too.

In a video promo for their Omaze charity raffle, the Oscar winners fight like an old married couple in their quest to prove who their mutual friend Tom Brady likes more.

"Maybe Tom could tell you what his favourite movie of all time is," Matt says sweetly.

"Or maybe he could tell you about the time you pressured him into wearing a Jason Bourne t-shirt and it was really uncomfortable for everyone," Ben bites back.

When the topic of Tom's glorious chin arises, Ben can't help but liken it to his own chiselled lower façade.

"Let me tell you something," Matt snipes. "If your chin was anything like Tom's, that Batman movie of yours would have made about $4 billion dollars. Cuz that's the only part recognisable of you is that big, ugly chin."

The New England Patriots quarterback eventually joins the conversation, but steers clear of his fellow Bostonians' bitter war.

"For the record, Matt Damon and Ben Affleck (listed in no particular order) do NOT pay me to be their friend," Tom posted on Facebook.

Money raised from the raffle goes to support Ben's Eastern Congo Initiative, Matt's Water.org, and Tom's TB12 charities of choice. Plus, one lucky winner will get the chance to hang out, drink beer, and eat pizza with all three guys.