1 definition by al bear

Top Definition
For all those photos you find in your phone after a belligerent weekend. GO WILD! Works well with Instagram.
You black out in Vegas and wake up on Monday morning to find incriminating photos in your phone from an unforgettable, yet forgettable weekend. Then you proceed by instagramming the photo with #mysterymonday in the caption.
by al bear August 06, 2012

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