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.

A pubic hair piece. A toupee for the pubic area/genitals. In the 1700’s when mercury was used to treat sexually transmitted diseases (Gonorrhea or Syphilis) one of the side effects was the loss of pubic hair. To disguise this condition, that was not cured by mercury, a Merkin was employed.

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