chitlin circuit
n.— «Some postulate that the phenomenal success of “Diary” is a logical outgrowth of the wild popularity of the “chitlin circuit” of gospel plays, one of which provided the basis for the movie, a crude spoof of 1970’s “Diary of a Mad Housewife.”» —“Success of a movie based on gospel play surprises Hollywood” by Tony Brown Plain Dealer (Cleveland, Ohio) Mar. 17, 2005. (source: Double-Tongued Dictionary)