verb: to sneak up behind someone, grab their underpants, and yank them forcefully upwards causing their underpants to get jammed up way deep in their butt crack.
dude, did you see what happened to that new fat kid on the playground? He got a grundy so hard it ripped the elastic off his nuthuggers!!!
by shellacked June 18, 2008
by StillBorn May 1, 2003
by M January 27, 2004
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 13, 2021
by peter grundy February 8, 2005
1 vb. To run very fast wearing only one's boxer shorts.
2 adj. To be in one's grundies - to be wearing only one's boxer shorts.
3 noun. Grundyboy - James Halsall.
4 adj. grundy - you can replace pretty much any word with grundy and come out with something that sounds like it should make sense, but doesn't.
5. adj - grundy. to be as of or pertaining to the action of running very fast wearing only one's boxer shorts.
2 adj. To be in one's grundies - to be wearing only one's boxer shorts.
3 noun. Grundyboy - James Halsall.
4 adj. grundy - you can replace pretty much any word with grundy and come out with something that sounds like it should make sense, but doesn't.
5. adj - grundy. to be as of or pertaining to the action of running very fast wearing only one's boxer shorts.
1. I got pulled over by a policeman for grundying down the A65 (true story)
2. I was in my grundies all day Sunday.
3. Hey, Grundyboy! How are you doing?
4. That concert was pretty damn grundy.
5. Running very fast wearing only one's Y fronts is a bit grundy.
2. I was in my grundies all day Sunday.
3. Hey, Grundyboy! How are you doing?
4. That concert was pretty damn grundy.
5. Running very fast wearing only one's Y fronts is a bit grundy.
by bslsthgrt - The Grunder In Chief June 22, 2005