to collect a pool of any shade of brown in underwear, long johns, pants or it is great to gather in tight sweat pants. It is usually consisting of loose stools, but I guess could be old menstrual clots as well.
"Mom? I'm dripping brown again!" "I'll be right there as fast as UPS would be!" "Well, mom, to answer their question on that commercial, I AM brown enough!" "Oh, Son, let me wipe now!"