Someone who often uses make shift pop or beer can pipes to smoke weed out of. Usually these people are too cheap to buy a real pipe, or are scared about being caught with a pipe by their parents or the police. These people are usually 14 or 15, and live in a skid town like gibsons or sechelt. This word can also be used to describe people who make apple pipes.
Kelly Joe is such a popcan warrior, he smokes outta that shit er' day.