file 13 en · NOUN
Meanings
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(US, dated, slang, uncountable) A trash can, wastepaper basket.
Just put it in file 13. It doesn't warrant a response.
If not, it’s not going to be of value to you or anyone else to put it in print after the event has taken place. Therefore it will be filed in file 13, and just in case you’re not familiar with this file, the army calls it the “waste-basket”.
1957, Cy Linder, “Piston Poppin’”, in American Motorcycling, page 34:
Synonyms
trashbin · wastebin · trashcan · garbage can · trash can · waste bin · round file · circular file · trash bin · circular filing cabinet · garbage pail · bin