Short for The Curious Incident Of The Dog In The Night Time - a novel by an English author called Mark Haddon about an 15 year old boy called Christopher Boone who has aspergers syndrome.
Also, it has been turned into a play.
See tag for full definition
(It has swearing and is not recomended for children even through it's classed as a childrens book.)
Sensible Avid Reader: My favourite book is Curious Incident but I don't understand why they swear so much.