To excrete feces, to defecate, especially in an extreme or disgusting manner.
Itchy had so much to drink last night that it made him shoot poo all day today!
by Jonny Case September 08, 2006
1 more definition
Going to the restroom for a bowel movement.
"Excuse me a minute doll, I need to shoot poo."
by JJ Bigs October 16, 2008