Definition of "doobie"

YO! Youse guys need to turn those frowns upside down, and I got just the thing for that… we call it… DOOBIE SNACKS!

2001, Kevin Smith, Jay and Silent Bob Strike Back, spoken by Jay (Jason Mewes)

In parts of the state, enjoying an occasional doobie is nowadays considered little different from sipping a Pinot Noir.

2010 October 14, “An altered state”, in The Economist

[The] atmosphere […] was one part oxygen, four parts nitrogen, and seventeen parts doobie vapor.

2012 April 20, Dave Barry, Classic Dave Barry