Corner pooper 

Someone who, in the middle of a conversation, goes over to the corner of the room and proceeds to pull down their pants and poop on the floor while the other person stares in disgust. Then the corner pooper pulls up their pants and returns to the conversation and points out that someone pooped on the floor over there and cautions the other person not to step in it.

"Man, the other day Gary and I were talking and that dang corner pooper straight shat in the corner and then had the nerve to tell me to be careful because someone pooped in the corner as if it wasn't him and I hadn't just seen him do It!"

Corner pooper by Jerrysguy June 11, 2018