The Collaborative International Dictionary
Thrashing floor
Thrashing \Thrash"ing\, a. & n. from Thrash, v.
Thrashing floor, Threshing-floor, or Threshing floor, a floor or area on which grain is beaten out.
Thrashing machine, a machine for separating grain from the straw.
Wiktionary
thrashing floor
n. (alternative spelling of threshing floor English)