Yestersode 

The TV episode previous to the one you are currently watching. Instead of saying, "on the previous episode", or "last episode", say, "yestersode"!

That contestant was voted off yestersode.

Yestersode by sanathan September 26, 2010

yesterfore 

–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.

yesterfore by Elijah Pack June 30, 2007

Yestertoday 

The technical yesterday when you haven't gone to sleep yet. When it's two am, you'd count the evening as part of today since you haven't gone to sleep yet. But you can't do this because it's technically a new day. So yesterday becomes yestertoday until you go to sleep or pass out.

4am at a kebab shop: "I just heard about this place from a friend yestertoday!"

Yestertoday by Solarion January 25, 2010

yesterdecade 

A portmanteau of the words "yesterday" and "decade", it is defined as the previous decade.

If the 80s was considered a yesterdecade, that makes the 90s the current decade.

yesterdecade by CrazyChristopher1989 March 12, 2019

Yesteryonder

The day before yesterday

Jason: When did you get back from your trip?
Alex: Oh...yesteryonder

Yesteryonder by Hmmnmnmnm August 29, 2017