I don't know if it is still in vogue but ten years ago in South Africa the phrase "Is it?" was common. It could be used as a response to almost any statement. Is it (ha ha) unique to South Africa or of Brit origin? examples: "I'm going to the movies" - "Is it?" "Can't find my keys." -"Is it?" "He's dead you know." - "Is it?"
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It's generally not used here in Australia. Beginner English learners sometimes use it as a much simplified inquiry into veracity of any statement, before they're able to put together more complex questions.