(medicine) A severe injury of the rib cage where fragments of ribs become detached from the rest of the cage.

a type of armored tracked fighting vehicle with a motorized spinning drum with the longitudinal axis of the drum arranged horizontally, perpendicular to the motion of the tank, with flail chains attached to the front end, which can clear landmines and barbed wire by beating them to bits

plural of flail tank

Third-person singular simple present indicative form of flail about

simple past tense and past participle of flail about

With flailing motions.