noun
also flat·ty ˈflad.ē
( plural flatties )
Etymology: flat (I) + -ie, -y
: something characterized by flatness: as
a. : a small working boat peculiar to Chesapeake Bay and more southern waters of the eastern United States that is sloop-rigged and that has a flat bottom, straight sides, and a centerboard
b. : flat 6e
c. slang : policeman