Definitions for shoofly pie
Random House Webster's College Dictionary
an open pie filled with a mixture of flour, butter, brown sugar, molasses, etc., and baked.
Origin of shoofly pie:
1930–35,Amer.; allegedly alluding to the attractiveness of the molasses to unwanted flies
open pie filled with a mixture of sweet crumbs and molasses
A fluffy pie made from molasses, traditional among the Pennsylvania Dutch
Origin: So-called because the molasses attract flies, which must be shooed away.