McHat-trick Share definition Flag Having all three meals of the day (breakfast, lunch, & dinner) at McDonalds. I just finished my McHat-trick with a BigMac Meal and I think I might die! See also gluttony and fatass McHat-trick by Ronald McFatass December 8, 2009 0 0 Get merch Get the McHat-trick mug. Buy Now — $32.95 See more merch