n ( AmE )
an open pie filled with a mixture of brown sugar and molasses (= a dark, sweet, thick liquid obtained from sugar). It takes its name from the fact that people have to shoo (= frighten away) flies that are attracted to it.
SHOOFLY PIE
Meaning of SHOOFLY PIE in English
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005