Particles and/or marks left in the toilet bowl after the first flush.
Before using the toilet, Brett had to flush his brother's residoo-doo.
by J.Kree March 15, 2009
Brown poop streaks left on a condom or penis after anal intercourse.
Make sure to douche yourself next time! When I pulled out, I had residoodoo all over my dick.
by homopinionation February 23, 2014
Shit on your anus that is left over from a crap session which will be wiped off with toilet paper.
by firstname.lastname@example.org April 27, 2006