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when you had a shitty sunday so your gonna take monday off and make it your good sunday
Bob: is today sunday?

Bill: yeah it is

Bob: it sucked

Bill: yeah it did

Bob: i think i will take a shmonday tomorrow
by achflemmed April 16, 2009
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2
The act of "smashing" on a Monday, usually involving two or more people of the same gender and one person of the opposite.

Based on her level of promiscuity, I think it's fair to say that she is excellent Shmonday material.
by Harry Bozak April 18, 2007
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3
Shmonday is the day of the week ocurring inbetween Sunday and Monday.
Brandon: "Hey Patrick, wanna hang out on Shmonday?"
Patrick: "Sure. In fact, this Shmonday is National Buy-a-Gun Day!"
by Frederick Paladinsky September 17, 2006
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