When something in conversation is so heinously disgusting that all you wanna do is barf. Instead you say, "YEACH!"

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)

The mix between agreeing to something completely and preach. Mostly used out of pure excitement.