A kind of drink invented in Hitchhiker's Guide to the Galaxy, which is not so much an alcoholic beverage as it is a super freakiy psychodelic fucked up halucinatory headtripping cocktail from some hydrophile's wet dream. After drinking it, it is said that you experience the sensation of having your brain smashed out of your skull with a slice of lemon and then wrapped around a brick of gold.
*Drinks a gargleblaster*

UHHHH! Why did I do that!? WHYyyy is EVerYthing BRIGHT? GoDAmmIt, StoP MOvinG your TENTacLES!
by Kerik July 13, 2006
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Used in reference to a strong alcoholic beverage, or a good blow-job.
That was one damn good gargleblaster.
by Shaolin Gumbo November 26, 2003
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The act of getting bladdered, sometimes but not exclusively by the consumption of Gin and Pear Drops.
Sally - When are we Gargleblasting next?

Steve - This weekend, I've had a tough week and feel like having my brain smashed out by a lemon wrapped around a large gold brick.
by Pookeymonkey November 20, 2012
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Doing a Gutterul Death metal Roar wilst rolling your tongue, making a rapid tremolo sound.
"Did you hear that Blasphetise song where he does that brutal Gargleblast?"
by blasphetise666 October 22, 2008
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An alcoholic drink invented by Zaphod Beeblebrox, the effect of which is like having your brain smashed out by a lemon wrapped around a large gold brick.
Beverage Menu:

1) PanGalactic GargleBlaster (Recommended) - Free Refills (Not Recommended)
by bathelm June 13, 2011
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