When an irate man or woman with a ravenous appetite consumes a large amount of commercial grade fast food. Famous Dak-Attack sightings are at Taco Bells, Burger Kings, and other establishments that allow one's blood pressure, and sugar to hit critical levels. Foods with high trans fat, sodium, and carbohydrates promote the most vigorous of said attacks.

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)

when you eat some under cooked brownies and you dak a lot like diarrhea and it hurts.