oh shat Share definition Flag Oh Shat is a phrase used to describe the feeling one gets when they forget how to speak, and mean to say Oh Shit! instead. *drops wood on foot* Oh shrshathshatahsd.... Shat. Oh shat. oh shat by MooMooMarie November 18, 2013 0 0 Get merch Get the oh shat mug. Buy Now — $32.95 See more merch