A moment of dis organization or confusion, perhaps caused by being hungover from the weekend, or just generally frazzled from the first day in a work week. Occurs on Mondays at the office when a general lapse in facade is made, during a period (at work) when your supposed to be professional.
I can't believe it! I completely dropped the ball and forgot to send RSVP for that meeting! I completely screwed up that whole project as a result. I hate these monday moments I have. Thank god tomorrow's tuesday.