The Collaborative International Dictionary
Parthian arrow
Parthian \Par"thi*an\, a. Of or pertaining to ancient Parthia, in Asia. -- n. A native of Parthia.
Parthian arrow, an arrow discharged at an enemy when retreating from him, as was the custom of the ancient Parthians; hence, a parting shot.
Usage examples of "parthian arrow".
The lucky ones were those who had died early, a Parthian arrow in their eyes or hearts.
If the turtle rejected you, you were as dead as the men who'd taken a Parthian arrow under Crassus.