One who brings drugs. As in "When you knocked, he thought you were the candyman" from the Rocky Horror Picture Show.

Also a song: Candyman
The Grateful Dead
Words by Robert Hunter

     Come all you pretty women
     with your hair hanging down
     Open up your windows 'cause
     the Candyman's in town
     Come on boys and gamble
     Roll those laughing bones
     Seven come eleven boys
     I'll take your money home

     Look out
     Look out
     The Candyman
     Here he come
     and he's gone again
     Pretty lady ain't
     got no friend
     till the Candyman
     come round again

     I come in from Memphis
     where I learned to talk the jive
     When I get back to Memphis
     be one less man alive
     Good Mornin Mr. Benson
     I see you're doin well
     If I had me a shotgun
     I'd blow you straight to Hell

     Look out
     Look out
     The Candyman
     Here he come
     and he's gone again
     Pretty lady ain't
     got no friend
     till the Candyman
     come round again

     Come on boys and wager
     if you have got the mind
     If you got a dollar boys
     lay it on the line
     Hand me my old guitar
     Pass the whiskey round
     Want you to tell everybody you meet
     the Candyman's in town

     Look out
     Look out
     The Candyman
     Here he come
     and he's gone again
     Pretty lady ain't
     got no friend
     till the Candyman
     come round again

Reprinted with permissions: copyright Ice Nine Publishing - see Grateful Dead Lyrics