When you are smoking out of a pipe, bong, bubbler or your price of choice, and the weed in the bowl has been fully smoked and only ash remains. This is a pooed bowl. It can also be used as a verb, in the act of poling a bowl.
(adjective). "Man, this bowl is totally pooed".
"This is such a pooed bowl, it tastes nasty".
(verb). "Lets poo this bowl and pack another fresh one".
"Hey guys, if Bill falls asleep let's poo bowls on his neck".