"Kai Po Che!" is a Gujarati phrase which means "I've cut the kite!," which a kite-flyer screams victoriously after cutting the rope of a kite of an adversary, mostly in a competition.
The character Ali Hashmi's shirt number in the movie is "10" which is a tribute to the greatest cricketer of India Sachin Tendulkar, who also had the same shirt number.
Chetan Bhagat's son Ishaan, played a small role in the film. He is shown as a kid insisting his mother to buy him a cricket bat while she goes to temple.
Based on the novel The Three Mistakes of My Life by Chetan Bhagat.
The child actor who played Ali in the movie is Digvijay Deshmukh and he ended up becoming a cricketer in real life too.