Someone who anticipates the worst possible outcome for a given situation, they dread everything.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)

A stupid moron who compensates for a tiny penis by being a huge asshole online while playing wow who still lives with his parents.