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1.
1. The caption of a popular "loldog" (dog version of lolcat) showing a dog attempting to drink from a lawn sprinkler. Word refers to the sound the dog presumably is making as it angrily (and pointlessly) attempts to subdue the water stream.

2. A one-word stand-in for any angry, incoherent, pointless reaction, comment, or attack. In online forums, the loldog referenced in (1) is often used to make the point that someone's position is incoherent, illogical, and or pointless. Simply writing 'WHARRGARBL' is also sufficient to make the point, and is especially effective if the target of your insult is one of the few people unfamiliar with the loldog.

Note that incoherence or pointlessness is required for a proper WHARRGARBL reference. An angry, but otherwise logical, argument is not a WHARRGARBL. An argument that takes a reasonable (or at least arguable) position, but does so with an incoherent rant IS a valid WHARRGARBL.

Coherence and logic (or the lack thereof) is in the eye of the beholder, of course. On the internets, any argument that disagrees with yours may be a valid WHARRGARBL.
News: The Supreme Court has ruled that Intelligent Design is not a valid part of federal science testing standards.
Christian Fundamentalists: WHARRGARBL
by Boidster August 14, 2008
 
2.
The sound dogs make when they attempt to drink out of lawn sprinklers.
...I heard this odd noise, sounded like "wharrgarbl", and I saw rover being sprayed in the face with the hose. Silly pup.
by Nx3 January 08, 2008
 
3.
A representation of what fundamentalist religious ranting sounds like to unbelievers. Commonly used on Fark, originally from an image macro involving a dog and a sprinkler.
"He went on this long spiel about how UFO aliens are actually demons and that they are an omen signalling the birth of the antichrist, but really all I heard was "wharrgarbl".
by Gorben September 24, 2008
 
4.
Inane speech or babbling; angry incoherent talking based on a sound that is imagined to come from the image of a dog getting a drink from a sprinkler.

<img src="http://i213.photobucket.com/albums/cc122/smitty7719/whargarbl.jpg"/>
"Jeeves when you are done wharrgarbling at the duchess, please join us in the west drawing room."

"Don't wharrgarbl me young man! March right upstairs and finish your homework!"
by Armandea September 07, 2008
 
5.
Although the 'politically correct' have co-opted "wharrgarble" as the cutsey sound a dog makes drinking from a sprinkler, the true definition is the sound made when a bartender shoves the soda gun into the mouth of a babbling drunk.
"Hey bartender, get your ash over here and pour me another...wharrgarbl!!"
by Laura Evelyn February 11, 2009