Not on Mah Burfday Share definition Flag An expression said When something bad almost happens, but it is avoided Dude 1: "That bird almost shit on you!" Dude 2: "Not on mah burfday!" Not on Mah Burfday by Sexual Harrassment Mary December 9, 2008 0 0 Get merch Get the Not on Mah Burfday mug. Buy Now — $32.95 See more merch
