–adverb
1. on the day preceding yesterday.
2. a short time ago: Yesterfore your money went further.
–noun
3. the day preceding yesterday.
4. time in the immediate past.
–adjective
5. belonging or pertaining to the day before or to a time in the immediate past: yesterfore morning.
Lola: This meat looks bad, when did you buy it?
Elliott: I bought it yesterfore, so it should still be fine.
The period of time past midnight, but before you go to sleep. It's obviously past midnight, but you're goddamn sure its not tomorrow yet. It's something in-between. It's not yesterday, but it is morning. It's yestermorning.
Not to be used in the present. Before sleeping, you may only refer to the present as tomorrow's yestermorning.