(adj) tending to engage in unproductive behavior, esp. as a result of over-indulgence in alcohol or cannabis; (n) one who displays such a tendency
"-Ricky hasn't been to class or the gym in weeks.
-Yeah, man, he's turning into a total dumpy.
-It's probably all the weed he's smoking."
"-Let's just dump today, Mitch. I'm too tired to get off the couch.
-Okay, dude. We can play Fifa...Wait Ricky, maybe we should pick up some weed first, in case we get bored.
-Dude, my dumpy ass already thought of that. It's right here in my pocket.
-Sweet! There's some beer in the fridge too."