Coined by The Man, William James Tiberius Byrne the word aftermorrow simply means the
day after tomorrow and it is a quick and easy alternative to the
long hand The-
Day-After-Tomorrow and a more familiar word than the Latin Postridies and Postetradies. By creating an amalgamation of the Shakespearean word Tomorrow and the everyday word Afternoon.
John Smith: We shall
meet again, perhaps tomorrow to be sure?
Dimitrios Falapotorius: No we shan't! I have a meeting.
John Smith: Whom'st has a meeting on a Monday? Alright aftermorrow!