noun; A extrordinarily gay plot twist in a movie or book that ruins the book and is way to ridiculous to be relevent. From director M. Night Shyamalan who is known for his insane ideas about how stories are supposed to work.
John: How did the movie end?
Jane: Terribly, it turned out the guy's father was a tree or something.
John: Wow, now that's a shyamalan-ma-ding-dong!