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
Sitting around in a group, discussing why a deadline was missed or a project failed, and identifying a scapegoat.
After a second customer refused to sign their newly-and-incompetently-redesigned "three-tier" support agreement, the VP of Support and the COO held a blamestorming session and decided to pin the problem on the customer rep, who was subsequently fired.