Cowabunga (interjection): /kaʊ.əˈbʌŋ.ɡə/ 1. (An exclamation of excitement or enthusiasm, typically used to express a sense of thrill or fun) Used in a sentece: Cowabunga! Let's slice the cheese out of these zombies! @State_Survival#FunPlus#TMNT#StateOfCowabunga