ITT I aware you of the GOAT word you don't use

"Overmorrow"

noun
the day after tomorrow:
I’ve heard that tomorrow and overmorrow may bring exceptionally high waves.


adverb
on the day after tomorrow:
If we leave overmorrow, we should not miss a day of the festival.


This word was in Middle English, but I am now making a movement to bring it back

LOL @ people that say "the day after tomorrow"
6'1, 205 lbs

Luke