peter grundy has a massive cock
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 July 2, 2005

by Jon O'Meara December 28, 2005

by Vodka Roulette fan March 25, 2009

by billy lincoln and nate (jew) February 19, 2005

(Auatralian) shortened form of government regulation undies, refering to plain or uncomfortable underwear.
by feuxfelix April 25, 2009

Really gross underwear, usually worn by fat, middle-aged men.
i.e. y-fronts and a stained vest are grundies.
i.e. y-fronts and a stained vest are grundies.
by Rileyrileyriley May 6, 2009
