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1.
n. Common reference to the great soul singer Al Green, whose greatest hit was "Let's Stay Together." It was in the early 1970s that Green san a run of hits that made him not just an R&B star but a pop icon. Since 1976, Green has concentrated on gospel music, recording numerous albums, but only two pop offerings. Since 1979, he has led his Baptist congregation, the Full Gospel Tabernacle, in Memphis, Tenn. For his release in 2007, "Everything’s OK," Green embraces both worlds by releasing a "secular" album under the name The Reverend Al Green.
"I wanted to put on this album who I am—to 'fess up to it! I'm the Reverend Al Green, and everybody calls me that, from Argentina all the way to the Catskills. So that's who I am."

"They've got catfish on the table
They've got gospel in the air
And Reverend Green be glad to see you
When you haven't got a prayer
But you got a prayer in Memphis"
-- Marc Cohn, 'Walking in Memphis'
by Dan Weyandt March 31, 2008
 
2.
Another term for cannabis. Simply as it includes the word green. Can be shortened to just Reverend.
Lets go see the Reverend green
by Yahegdirf July 11, 2006