the small, whitish (sometimes yellowish or even greenish) in color, foul smelling (completely stanky, really) bits of crumbly clay like crap that come out of the back of your throat when you cough or blow your nose too hard. (See also, tonsil stones)
"Wow Andy, why are you making that disgusted face?"..."Gee Mitch, maybe its because I just hacked up some white poop and I can kinda taste it in the back of my mouth."
by gatortommy July 17, 2008
When one cums in another's rectum , the recieving party dumps the shitty, cummy load on their partner's chest.
Rich took a giant whitepoop on Jeff's chest after a rousing anal thromp.
by Jeff Silberman February 11, 2007