latch key kids

[Bill Mullins]

Not in OED
Boston Herald 11/15/1942 p B5 col 8"Locally and nationally, they've determined to agitate for recruiting and training of ENOUGH women NOW to replace men in factories . . . for ENOUGH day care and recreation centers NOW to enable mothers to enter war work, untrammeled by worries of "latch key kiddies" . . . "                                     
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The American Dialect Society - http://www.americandialect.org