a threat, insult, condemnation, sarcastic retort, or the like, uttered upon leaving.
Origin
1890-95; perhaps by folk etymology from Parthian shot
Examples from the web for parting shot
My parting shot was a poorly aimed stone that struck a large tree with a resounding snap, which sent the bear scurrying.
British Dictionary definitions for parting shot
parting shot
noun
1.
a hostile remark or gesture delivered while departing Also called Parthian shot
Idioms and Phrases with parting shot
parting shot
A final insult or last word in an argument, as in As she stalked out, Jane hurled as a parting shot, “And I quit!” This idiom apparently originated as a corruption of Parthian shot, referring to the practice of ancient Parthian warriors of turning back to shoot at their pursuers. [ Late 1800s ]