Small brown balls found in the crotch area of a woman's panties. Formed by the amalgamation of the remanants of faecal matter, piss crystals and other vaginal discharge.
"I ate one of Carols Quilby Knots the other night, it looked and tasted a bit like a malteaser."

"Can you recommend a washing powder that will get rid of my Quilby Knots"
by Zombie_475 July 3, 2014
Get the quilby knot mug.