beaver grease
It is a culmination of breast sweat that drips down to the belly button and mixes with the button lint then slides down to the crevices between the thighs and vagina and pools in the asshole then is absorbed into the underwear.
The beaver grease is so thick you could spread it onto toast.
beaver grease
the secretion from a womans vagina
" Honey, your underwear is covered in beaver grease."