Smell By Date Share definition Flag The date at which food starts smelling bad, thus becoming inedible. This is normally several days after the sell by date. Husband: Where is the bread? Wife: I chucked it out, it was well past it's Smell By Date. Smell By Date by HealthyLiving February 25, 2011 0 0 Get merch Get the Smell By Date mug. Buy Now — $32.95 See more merch