is it

Used other than figuratively or idiomatically: see is, it.

- It's ten o'clock already. - Is it?

It’ impossible, or is it?

(Canada, India, Multicultural London English, South Africa)Really? is that so?

- I'm feeling tired. - Is it?

2007, Dan le Sac vs. Scroobius Pip, "Thou Shalt Always Kill" on Angles Thou shalt not express your shock at the fact that Sharon got off with Brad at the club last night by saying "is it?"