dust-off
n.— «Remember when we were out in the field and I couldn’t get any “D” rings for my ruck sack? And you told me if someone goes in on a dust-off to take them off their ruck? Well I did, thanks. They were on your ruck!» —by Mike Mancuso Letter Aug. 26, 1970. (source: Double-Tongued Dictionary)
Further reading
Miley in The Dalles, Oregon, asks about going gunny bags meaning to “break down” or “go haywire.” Her mother uses this expression, but has no idea where she picked it up. The term gunny sack, referring to a bag made of coarse material such as jute...
A Green Bay Packers fan wonders why a quarterback who’s tackled is said to be sacked. The roots of the word sack as in “bag” goes back thousands of years, all the way to Akkadian, later spreading through Greek, Latin, and then to Romance and...