Wiktionary
dustbag
n. The bag inside a vacuum cleaner where collected dust is stored.
Usage examples of "dustbag".
Still in the dustbag of the Great Celestial Vacuum Cleaner, if I'm not very much mistaken.
Then you sent that mindless dustbag Skarnhrafn after Ingvold, which was one of the more useless things you've done, since he can't get it out of his head that he is supposed to carry her back to you.
The blankets were dustbags with a few nameless little crawling things, and the sheets were filthy.