O tempora! O mores! (?? ?t?mp??r?? ?? ?m??re?z) sentence substituteoh the times! oh the customs!: an exclamation at the evil of them[from Cicero’s oration In Catilinam]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014O tempora! O mores!A Latin phrase meaning oh the times! oh the customs!, used to exclaim that these are bad in some way.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited