oops- Sadane, not sedane - it's... It's a game, I think a pseudo anagram of Disdain - you're supposed to give backhanded compliments in a catty sarcastic way. Hilariously it's one of the main skills at art school.

"your style has really progressed, it's got a very youthful energy that I've only seen in the drawings of very small children." Is a Sadaneing.