"Resin or Rosin (Oxford dictionary) is a hydrocarbon secretion of many plants, particularly coniferous trees, valued for its chemical constituents and uses such as varnishes, adhesives, as an important source of raw materials for organic synthesis, or for incense and perfume. Fossilized resins are the source of amber. The term is also used for synthetic substances of similar properties." (Wikipedia)
Condition that is caused by getting weed resin on one's hands, usually occuring after the cleaning/emptying of a bowl, bong, pipe, etc. Common side effects include sticky hands/fingers, impossible-to-remove black goo, and lingering pot odor.
Person 1: Dude I don't know if I can go to class today.
Person 2: Why not? We aren't even that high.
Person 1: I just got resin hand. I think I'm gonna have to wash my hands for the next hour to get rid of the stickyness and stench.