Older underwear reserved by women for *that* week of the month.
Janet kept her grundies buried under the nicer stuff in her her sock drawer.
by EVilw July 11, 2008
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Way back in the 60's it was a common phrase used for an erection. It was used in reference to the teacher on the Archie cartoon series, Miss Grundy. If your penis was Really hard, it was called a "Grundy" because it pulled so hard on your skin that the leaders(tendons) in your neck showed like the teacher on the Archie cartoons.
That hot chick over there in the string bikini is giving me a Grundy!!
by SMOKINGMAN November 1, 2008
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Thought to originate from Michael Grundy,the coolest cat to ever walk the earth, meaning sublime and the most ultimate form of cool one can find
man, he sure can dance grundy!
by MG September 25, 2003
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Grundie is multiple artsy alternative fashion/aesthetic styles mixed together, specifically the mixing of dark and edgy grunge style with colorful and creative indie style. A person identifying as grundie will have a collection of eclectic things that don’t fit into one aesthetic. They may find themselves embracing multiple aesthetics at once, wearing all black with red accessories one day and tie dye with all black accessories the next. They will probably hand make much of their room decor and enjoy customizing or up cycling their clothing. They’ll probably also enjoy a large variety of music genres, from country, to pop, to screamo.
“What would you say that person’s style is? They can’t seem to decide.”

“Oh, they’re probably grundie.”
by Bones_h March 30, 2021
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Large Chinned Balding Cock Gobbler, with Titanic Spiral Balding Patch in back of Head, prodominantly covered over with hordes of grease or bryl cream !!!!
1.) Dude, that Guys got a proper Grundy!
2.) Check out the grundy on that!
3.) Slipknot fans are a load of proper Grundy's!
by Ray Lemon September 14, 2007
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The act of giving sombody a wedgie after putting sand down their pants or shorts.
The lifeguard gave me a grundy when I bumped into him on accident. I was chaffing for weeks on end, with nothing but pain to look forward to until i went to the doctors for melvin wedgie and grundy reconstructive surgery.
by theend956614756 April 27, 2010
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