COWABUNGA 1954, American English, from exclamation of surprise and anger by "Chief Thunderthud" in "The Howdy Doody Show," 1950s children's TV show; used by surfers 1960s as a shout of triumph. In the 70's, I had a poster with Snoopy. He was on a surfboard saying: COWABUNGA! I wish I still had it. Don't ever over-use a word, because if you do, it loses its punch.
If you chase enough rabbits, you'll make a trail. Come down those trails with me.