An immensely powerful/explosive shit coming from the anus
Man, I just did the biggest grundy. /or/ I walked past the toilets and some bitch was taking a large and dirty grundy.
by bustagrumpy June 7, 2010
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"Oh shit, son. I took a massive Grundy in Maria's bathroom. I dare ya to light a match!"
"Why are you telling me about your shit, bro?"
by infamous weezer January 9, 2012
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Something that is grotty, dirty or generally foul. Also a type of troll or gargoyle.
that fart smells really grundy!!!
by ram jam 1991 May 11, 2011
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When one puts their cold hands on another person's warm body, causing him/her to recoil.
Jess gave Jon a grundy when she came inside shortly after playing in the snow.
by Jon O'Meara November 26, 2005
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The area of skin between a mans scrotum and asshole. Usually used in a threatening statement.
I'm going to punch/kick you in the grundy.
by Dave Williams November 29, 2004
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The downing of alcoholic shots (in particular vodka) in one go

'I got a grundy in vodka roulette '
'Prize to anyone who can get a grundy'
by Vodka Roulette fan March 25, 2009
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Going missing in a brothel for a week, smashing loads of bag before going home and pissing and/or spitting on your family
I fucked up this weekend, done a grundy didn't I
by Reegzie December 14, 2018
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