when you fax someone a ton of double sided black sheets of paper. Could possibly be illegal. This can be used to waste someone's ink supply for their fax machine/printer. present tense is black sheet bombing.

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)