Noun - The feeling two or more people feel simultaneously when something is very sad and/or dissapointing.
Ben and Katy drove to Wendy's to get Ben a chocolate Frosty. When they ordered a chocolate Frosty, the man told them the chocolate Frosty machine is broken. Ben had to get vanilla. Ben felt depressed, and so did Katy. They were feeling mutual depression.
af steven412 15. august 2010