pronounced IZit.
1. "Really, is that so?"
2. "Your're having me on."
3. "Christ, I don't believe that for a second."
You: I slept with Kim Mathers last night.
Your mate: Is it?
You: She was a right cunt.
Your mate: Is it?
You: Wanna get some crisps?
Your mate: Yeh, bru.
by Anonymous September 24, 2003
When used as a statement (and not a question):
1. No it's not.
2. As if.
3. That's fucking bullshit.
Baz: "My penis is huge"
Jay: "Is it!"
by X-treem August 28, 2003