1. a small bird with a tendency to view life in terms of one's own needs and desires.
2. a narrow minded, excessively rigid and emotionally detached human being, with bird like feet.
3. term used in frustration on a dim witted friend.
"Get out of the way of the tele you Autistic Sparrow"
British, informal.
A childish or jocular but ultimately endearing term for someone who has a human penis matching that of a cat.
Typically, it is expected that in this instance the human possesses a penis that is small, with little impact on the world or the underwear it occupies. See also "Cat Cock"
"Alright Cat Willy?! What are you up to you fucking small-dicked little wanker?"