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Mortereve is a combination of "MORning, afTERnoon, and EVEning," used as a greeting in international/ multi-time-zone contexts (such as an Internet forum or conference call).

First used on www.narniaweb.com c. 2006.
I logged onto the forum and wished my friends from New Zealand , the UK, and the US a Good Mortereve.
by berninbush July 20, 2017
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