In Bongla, kaan = ear. Chautiya = way of saying chutiya (sort of).
Literally, ear fucker. Implication is, fellow's dick is so small, he is literally suited only to fuck the ear canal.
In angry whisper, so ladies don't hear: "Listen you kaan chaut, I'll have you thrown out of the Tollygunge Club if you mention my mistress in front of my wife. Understand?"
Added 2012-01-09 by Logonathan