Old U.S. Navy term meaning operator head space, or someone who does not have much brain in their skull.
President Bush suffers from OHS on frequent occasions.
by Kenosando December 27, 2006
Pasionate way to explain one's pain/feelings or just another way to say "OH SHIT!"
When Paul's bi-polar girlfriend, Nhu slapped him he squeled "OHS!" with pain and shock
by swisschick October 14, 2008