What does "bubble and squeak" mean in slang?

In slang, bubble and squeak primarily refers to the British dish of fried leftover potatoes and cabbage, but as slang it has some additional meanings. Literally, bubble and squeak is not strong slang but a traditional food name from the bubbling and squeaking sounds it makes while frying. In Cockney rhyming slang and general British slang, bubble and squeak can mean to speak or talk, as in have a bubble, meaning have a chat, though this is more associated with bubble. In some British slang, to have bubble and squeak can mean to have a mix of everything or a mishmash, referring to using up leftovers. In older British slang, bubble and squeak was sometimes used as rhyming slang for to speak, as in bubble and squeak equals speak. There is no widely used offensive slang meaning for bubble and squeak, it is mostly culinary. In some regions, calling something bubble and squeak means it is a jumbled mixture. In American slang, bubble and squeak is rarely used except to refer to the British dish. So in slang, bubble and squeak means leftover mix fried up, or by extension, a hodgepodge or a chat, depending on context, but it is not a swear word or insult.