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1.
The feeling one gets at the beginning of each working week; also known as the 'Monday Feeling'.
"Man, everyone in the office is feeling a bit Mondayne!"
"You're right there!"
by william200mph September 19, 2005
 
2.
A mundane Monday.
So I arrived at work today, and I am staring at the same thing that I did last Friday. Actually the same thing I've been working on all month. It's definitely another Mondayne.
by ilikemuffins85 March 14, 2011