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2.
A cool kinda way of saying 'wow!' or 'geesh' instead of 'oh my god'.
'Oh my days! What is he DOING?'
by Jezzum October 19, 2005
 
1.
A term which is used in when shcoked or in awe or something.

A certain Josh Mills is fond of this term.
"Oh my days, BISCUITS"
by morgangills November 21, 2004
 
3.
Used to express shock, excitement and uncontrollable emotion.
"Oh my days, that's shocking! As if he farted!"
by Travvo April 20, 2009
 
4.
Used in an element of surprise. Sometimes the O is left out.
Keith & Rob: 'h My days.
by Wheelboob April 04, 2003