One who, upon wiping their arse, then proceeds to sniff the soiled toilet paper to discern the odor/nature of what they have produced.
"That girl Marie is a goddamn poo sniffer. She admitted it when she was drunk the other night. Gross."
by felix lumbago March 24, 2008
Juan told Julio hat his ass hurt. He had no idea he was a poo sniffer. Getting paid cash under the table and getting welfare was cool, especially since he doesn't pay any taxes and is actually more racist than the gringos.
by Down in your valley September 08, 2014