Commonly the result of doo-doo butter, a doo stain is the result of improper wiping after defecating. Typically the doo stain is immediately apparent in undergarments that come into contact with the rectal area.
"Wow man - that is a crazy doo stain - did you even wipe?"
See doo stain, doo doo, crap, doo-doo butter, dump
