Quite simply, a 'Brown Run' describes the hurried scurry to find the nearest Khazi when one feels ‘under pressure’ and is quickly realising that one should really have shat earlier, indeed much earlier !
"Just got back from skiing holiday, no bloody snow on the black run! I did the blue run tho, anywayz, I've just travelled 300mile down from Newcastle, I'm off for a Brown Run!"
by Zerlina Pablos January 23, 2007