A derogatory term for a scuzzy wannabe-hippie drug dealer, primarily selling skunkweed and possibly a little fake blotter acid for good measure. Always unwashed, with greasy matted hair (typically dreadlocks), the dirt merchant has horrible B.O. with an over-stench of patchouli mixed into it. Filthy feet poking out of Birkenstocks and lots of hemp jewelry are a hallmark of the dirt merchant, as is the inability to form a coherent sentence. Favorite bands are The Grateful Dead (of course), Phish, and the String Cheese Incident. Probably homeless, though he or she may live in a busted-down bus or VW Vanagon, probably with at least 5 other dirt merchants and one or two stinky dogs.
That dirt merchant just tried to sell me a bag of shake for $35!
Shit, remember that dirt merchant I met who was slinging acid next to that Port-o-Potty at the String Cheese Incident show? She totally gave me crabs, man!