A "METHodist" is someone to engages in the use of Methamphetamine. If a dealer is trying to be discreet and find customers without reveal outright that he's a dealer, he'll ask "so, you a Methodist?", if they are a meth-head, in this part of the world, they'll know what he/she means and respond accordingly.
by M4RKz October 01, 2011