Midwest police slang for smoking a joint with a friend.
(As cop knocks on a window in a car with 2 guys in there) Cop- "What are you guys doing in there?"

Guys- "Just sitting here, hanging out"

Cop- "Oh, ok, I thought you guys were plantin' a beaner"
by Wackabowski June 16, 2011
Get the Plantin' a beaner mug.