someone who puts people in a sad/bad mood
i dont mean to be a debby downer, but your dog died.
n. pronounced: deb-ee douw-ner
1. A outwardly depressed male or female; under any circumstance, this person's main objective is to trash, ruine, spoil, muck-up, jack-up, and in many cases absolutely KILL your joy.
2. A person who has mastered the art of self-pitty; will go to great lengths to get anyone who will listen, to feel as depressed as they feel.
1. Stop sulking. Nobody like a debby downer.
Sue: Hey its friday, lets do something fun!
Paul: I hate fridays. It only reminds me of the terrible week I just had. (sigh)