Two days ahead of today, or the day after tomorrow. Its origin is German and it was used in old English so try not to use it around the uneducated or you will confuse them easily.
Coach: We have practice tomorrow. See you at 4:00.

Nic: But do we we have anything overmorrow?
Coach: Really dude? What the hell are you talking about?
by MrFly August 27, 2016
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