Debbie Down Syndrome 

When somebody is acting liking a debbie downer, but is being retarded about it

Bill: Wow, the score is 12-11. It looks like its going to lose this game.
Matt: Wow, we're only down one point. You're being a real Debbie down syndrome

Debbie Down Syndrome by King Cunta August 12, 2017

Debbie Downsyndrome 

A person who is always down and it a bad mood, and puts others in bad moods as well. Usually is in a bad mood from being ugly or gettin made fun of.

person 1: "Tough fish"
person 2: "Heis, stop being Debbie Downsyndrome for 5 min"

Debbie Downsyndrome by Todd Fisher April 21, 2008