It also has a very general use, often substituted for the generic and overused word “fuck”. If I accidentally hit my finger with a hammer, I would say “Cack!!”, not “fuck”.
“Cackasaurus” is an extreme manifestation of Cack. If a person is very rude and very unpleasant, that would constitute the label of “Cackasaurus”.
Adverb: when “Cack” is set in motion…If a rude person is walking down the street, he is in fact, Cackingly walking down the street.