brown dawn Share definition Flag The need to excrete out of one's anus just after waking up in the morning. Normally preceded and followed by malodorous smells. Esh: Mate, it's 7 am and the toilet stinks.Axel: Sorry. It was a very brown dawn. brown dawn by Tom Sneddon June 3, 2013 0 0 Get merch Get the brown dawn mug. Buy Now — $32.95 See more merch