A kind of marijuana made clandestinely by mixing comerical grade chronic with another perscription drug, particullarly adderal, and then smoking it. Other drugs may be used as well. Overall, this is generally a poor idea since most perscription pills are not intended to be incinerated. Sometimes these drugs have toxic fumes which are not really intended to be inhaled by anyone.
"Dude, lets make some nitro-weed, I have got the adderal, and you've got the bud! Lets throw them both together and smoke dat shit!" "Dude, Craig, you're a retard"