A hand wave characterized by jerky arm motions, full extension of the wave hand, quick and jerky left and right motions of the hand, and the wide opening of the mouth coupled with the expression of surprise on the waver's face.

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)