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Underwear soiled with fecal matter, having skid marks or filthy from bodily fluids such as semen, urine, vaginal secretions or ass sweat.
I just sharted. Iā€™m gonna have to walk around with grunderpants all day.

She pulled her panties over my face. While expecting a fragrant experience, I got grunderpants and a big skid right across my nose.

I sniffed her grunderpants and it was a whiff of stank ass booty juice.
via giphy
by Ben Dribblin June 01, 2018
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