What you say when someone has done something extremely well. Comes from actual darts playing, if a player hits three triple twenties or somthing, other players or spectatores say 'tidy darts' or 'good darts'. Also comes from the Welsh slang 'tidy', meaning 'nice one', 'good' or 'that's great'.

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)