cowabunga

Etymology
en, but was popularized (as ) by Chief Thunderthud on the American children's show  in the late 1940s or early 1950s, and became associated with American. By the early 1980s, it was used as the catch-phrase of on the American television show Sesame Street, and gained popularity with a broader audience after its use in the American cartoon Teenage Mutant Ninja Turtles in the late 1980s and early 1990s. (For further treatment, see here.)

Interjection

 * Cowabunga, dude!
 * Cowabunga, dude!
 * Cowabunga, dude!
 * Cowabunga, dude!
 * Cowabunga, dude!

Synonyms

 * See Thesaurus:wow
 * See Thesaurus:yay