parting shot

parting shot idiom
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]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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