Now #stfu or simply stfu is an abbreviation for shut the fuck up. it is used to discourage people who might say something you don't like or comments against a generally accepted norm or conventional ideas.

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)