The phrase "innit" is British English slang, a contraction of "isn't it" or "is it not." It is used mainly as a tag question to seek confirmation or agreement, often at the end of a statement. For example, "It's a nice day, innit?" means "It's a nice day, isn't it?" It can also be used casually to add emphasis or camaraderie in informal conversations, particularly in the UK. Additionally, "innit" has broadened in use and can sometimes replace other question tags like "aren't they?" or "doesn't it?" depending on context. It is very common in British speech and social media and is not considered standard formal English but rather a spoken contraction widely accepted in casual settings.

The phrase "I'm talking about innit" or similar variations often mean "You know what I mean" or "That's what I'm saying!" and is a casual or emphatic add-on used for emphasis or to seek agreement with what is being said.