noun

• (collective) A group of hyenas.

verb

• (intransitive) To make a sharp, broken noise or cry, as a hen or goose does.
  "When every goose is cackling."
• (intransitive) To laugh with a broken sound similar to a hen's cry.
  "The witch cackled evilly."
• (intransitive) To talk in a silly manner; to prattle.
  "It is also the business of a sensible government, not to cackle on its discoveries"
• (transitive, gambling, slang) To pretend to rattle (dice) in one's hand while gripping them so that they maintain their orientation.
  "Danny cackled the dice furiously in his cupped hand, then rolled them so they stopped inches from Slattery's hands. The result was the same as before – a seven."