Ever Hear Of Kris-Cross Applesauce?

Ist let me apologize for the awful photo.  Without getting too personal, we (my girl and I) take care of two teens. My girl has custody of her little brother and sister because they have lost both of their parents. That means they have been cursed with me as the adult male role model in their lives. God have mercy on their souls.  The other day we got on the subject of sitting, “Indian Style.”  They asked what that was. Further more, they call it, “Kris-Cross Applesauce.”  They say that is what they learned to call it? Did something change? Are we not supposed to say, “Indian Style?”  Did that become offensive? Was it always? I am confused.