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(exclamation): Originating as a greeting by Chief Thunderthud (the only Indian ever to have a moustache) to the Peanut Gallery on the 50's television program "The Howdy Doody Show", the term was later adopted by surfers in the 60's.
Chief Thunderthud: Cowabunga, peanuts!
The Peanut Gallery: Cowabunga!
Surfer: Cowabunga, dude!
by Vermont Ferret July 19, 2005
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An exclamation of rejoice from the early 1990s. Usually uttered by teenagers wearing neon colors. Brought to popularity by the ever-so-famous Teenage Mutant Ninja Turtles.
Leonardo: The pizza just got here!
Michaelangelo: COWABUNGA dude!
by quirky sally October 12, 2003
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A greeting used by only the most intelligent. Often said or used while (orgasming) or (shooting the goo)
Cowabunga dude.
by 3 pac January 28, 2019
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60s SoCal surfer slang popularized by artist Matt Goening's animated skateboarding cartoon character Bart Simpson, son of Homer "Doh!" Simpson, on the still running ― 20+ years ― "The Simpsons" TV show.

Of course, surfers picked word up ― as Vermont Ferret wrote ― from Chief Thinderthud's greeting and his peanut gallery's response on the old time (1950s) children's TV show "Howdy Dowdy," an eponym for its cowboy manikin. Back then, on old corny Westerns, an Amerindian's greeting was stereotypically, "How!" to be rejoined with a "How!" So How morphed into Cow and an "abunga" was added for silly kid ― or those with Peter Pan syndrome ― fun.
by mpcAstro August 30, 2012
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When you pull a girls bloody tampon out and swing it like a nunchuk and hit her in the face with it.
I had Saam in the shower last weekend, she had a tampon in so I gave her the cowabunga
by Browniebaby July 22, 2017
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a cool word used mostly by surfers to greet each other, say they are having a good time or just happy.
Kelly Slater- "Cowabunga!"
Laird Hamilton- "Totally, dude, this party is awesome!"
by Kewl Chick S July 07, 2009
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The act of mounding cocaine on a (usually Columbian) woman's asshole, placing your face directly over said mound, and inhaling deeply through your nose as she farts. Subsequently, inducing a sense of euphoria that can only be expressed as Cowabunga!
"Hey, man how was it last night? Sounds like you two got pretty crazy.
"Yeah bro! Shit was off the hook! She gave me the Cowabunga!"
"Sick homie! You should go was your face though before we hit up the frat house"
by Mr. Tummy Styx November 21, 2018
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