alright my best friends mom had friends stay at there house for a while..and the peoples son was retarded, his name was joe menino...so one time me and my friend realized that jm(joe meninos initials) was mj(mary jane) backwards. we though it to be only proper to refer to weed from then on as joey. and alchohol is willy...i think i was fucked up one time and it just clicked haha..