Blettuce Share definition Flag The tiny, wayword piece of lettuce that finds it's way into a bean burrito from Taco Bell, thus ruining an already difficult situation. "How's your food, yo?""It was fine until I got a bite with blettuce!""Oh, that's turrible!" Blettuce by Dr. Strangefinger June 11, 2013 0 0 Get merch Get the Blettuce mug. Buy Now — $32.95 See more merch