o-dawn-hundred

[Jonathan Lighter]

"O-dark-thirty" has been military lingo for the wee hours since Vietnam days.  So "o-dawn-hundred" now means at dawn.
 
1995 Usenet: http://groups.google.com/group/rec.arts.sf.written.robert-jordan/browse_frm/thread/f7982a5b991e8985/a17233c6c132de78?hl=en&lnk=st&q=%22oh-dawn+hundred%22#a17233c6c132de78 (Dec. 6): My plan was to leave here at oh-dawn-hundred on Saturday. 
 
They're saying it a lot on HBO's _Generation Kill_.
 
JL




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