The McDonald's shitz is a mass phenomenon that occurs after one has eaten any item from the food restaurant branch "McDonald's". This shit will occur in the hours after the McDonald has been consumed. This can range from 15 minuets to 6 hours, after this time limit it may no longer be deemed as the McDonald shitz. These shitz are very much felt as a relief to consumer, they will feel great satisfaction.

when you're hungover as shit after a spending a night drunk as a skunk