to hit with extreme force that usually results in embarassment of the victim of this extreme force. A "Cadoosh" is generally an epic spectacle to see. "Cadoosh" is usually said by the person who this extreme force originated from. How many o's are present signifies the extremity of the force.
A person who is frustrating you and there is nothing you can do or say about it so you go to the walk-in cooler and make up names for that person frustrating you
(*generally reserved for petty self-conversation)
"Why you such a Douche Canoosh, Dr. Frank?" Dakotasaid as Frank danced dandily in the street.