In this article about male friendships, there are two references to "dish":
"Well, what do you have for me?" Dish, she meant – like maybe some of that marital strife.
"What do you got for me? Any dish?"
I'm a pretty confident non-native speaker, and I know it refers to neither food nor plates and bowls nor antennas. Nor this sexist talk.
I'm pretty sure this is about gossip or something in that area but I couldn't find any sources.