When an individual has a 'gut feeling' something bad is going to happen without there being any sort of reason for them to believe that. This would also be used to describe when someone randomly gets the goosebumps or chills out of nowhere.

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)