Extremely stupid person, someone who acts as if they've already donated their brain to science--before they die. Clueless. Dumb as a rock.
by JJRtwu2009 December 8, 2008
by stiff October 10, 2004
A euphemism for marijuana. Instead of explicitly asking a random person for an illegal substance, it is used out of politeness and legal reasons.
Old hippy guy: Hey man... you got a brain-donor card?
Young dready: A brain-donor card? What the fuck is that?!
Young dready: A brain-donor card? What the fuck is that?!
by Ryan Guide December 10, 2007
by babyeater29126 April 28, 2015