Contrary to popular belief doche is used to signify the orgasmic awesomeness of any person, place or thing. It is often used as a greeting in conversation to celebrate the moment you meet someone you pwn at life.
It has opposing or unrelated meanings to the word douche or douche bag.
Warning: Do not use this word against severely insecure or suicidal persons.
Doche Doche Doche! I feel incredible seeing you I fuckin' own you in all ways possible. You make me feel great. Doche!