by Twollamas May 16, 2017
 Get the Grundymug.
Get the Grundymug. by StillBorn May 1, 2003
 Get the Grundymug.
Get the Grundymug. A state of being, that is defined as one being, "Grundy". An adjective denoting a person, person's actions, or state of being distinguished as anything gnarly, without the positive attributes. Grubby, sludgy, smelly, rotten, vile, dishonest or scheming. Shenanigans, outlandish tom foolery and definitely not cool or admirable. In the hood, this can be known as "greezy".
You mean Daryl? That dude is one grundy son of a bitch. He smells like he rides a horse to work and steals everyone's tools.
by Tk  April 12, 2021
 Get the Grundymug.
Get the Grundymug. 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 8, 2010
 Get the Grundymug.
Get the Grundymug. "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?"
"Why are you telling me about your shit, bro?"
by infamous weezer January 9, 2012
 Get the Grundymug.
Get the Grundymug. by ram jam 1991 June 5, 2011
 Get the Grundymug.
Get the Grundymug.