This is the version I researched and found back when it was going around. It's actually a 3 word term and it's from the Adamic/Antediluvian language. Phonetically is sounds like covfefe but its actually cuv-fee-fae. The language died out after Nimrod and the Tower of Babel.

The tweet was left up for several hours without any clarification as to what the word “covfefe” meant. Was it a typo? Did the president want coffee or mean coverage? No. It is quite simple actually.

Dianne Marshall, an amateur historian, bible scholar, and author went digging and found that it is actually an Antediluvian term. It means, “In the end we win.” According to Marshall, it was commonly used by the sons of Adam as they fought against the evil and fallen men."

The term is: Covfefe’ (pronounced “cuv – fee- fae”)