(Adjective) Vernacular referring to a bag of illicit substances that contains noticeably less "stuff" than was advertised, but not so much less that the purchaser will do anything more than grumble slightly. For bags missing much more of their content, see "fucked over".

When you eat dirt for the first time and leave your family to build a shack in the woods

the bag that heroin users keep all there heroin tools in.