Someone who takes offense to a joke very easily can lose temper at a flip of a switch.

Relating to the Washington State Governor debate where one candidate lost temper and someone yelled "MOLD DICK" from the Audience

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)