A brown blanket is when someone defecates on ones body and the feces is wrapped on the person forming a blanket. If done with diarrhea this is know as a Wet blanket
Son sometimes in life you have to get creative in bed last night after I ate that chipotle I gave your mom a wet blanket and she’s never slept better. I get it now can I give sis a brown blanket tonight. Why yes you can son after all we live in Mississippi.
Guy1: one day I poked my brother in the eye with an apple pencil. she cried and cried. it was pretty warm so I didnt need a blanket on the hot day of winter Guy2: You’re an idiot.