Related to absit omen: portents
absit omen(ˈæbsɪt ˈəʊmɛn)
may the presentiment not become real or take place
[literally: may the (evil) omen be absent]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
A Latin phrase meaning may there be no ill omen, used to express a wish that something bad that has been mentioned will not actually happen.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited