yesternite 

slang for last night, mixes yesterday with night...yesternite

yo keldog yesternite was off the hook

tzibit where were you yesternite

yesternite by tzibit October 6, 2006

Yesternight 

Last Night.
Yesterday Night.

Dude, Mark got so shitfaced yesternight, I think he went home with that gay guy James.

Yesternight by ZACH BAMF June 23, 2008

yestertech

Outdated technology which was more popular in yesteryear.

Anybody with any sense refuses to buy American cars because they are always full of yestertech.

yestertech by PelotonKing July 21, 2008

yesternight 

Yesterday night.

So, what happened yesternight, anyway?

yesternight by Bobert June 25, 2004

Yesterbate

To masturbate to something you found hot the other day.

Matt: Dude, i just saw this hot chick the other day!
Travis: Did you yesterbate to her?
Matt: Hell yeah!

Yesterbate by Whatever you want it to be. April 25, 2011

Yestertime

Yestertime- (n.) a non-specific referrence to the very recent past when something happened or something was supposed to happen. syn. Lastertime, Yesterday (etymology: North America 2000 Allegra Davis a small child invented the word from yesterday, last-time and yesteryear mix)

"Mommy, yestertime you let me swim naked in Nana's pool."

"You said yestertime you would put that horn on my bike?"

Yestertime by Captclam July 27, 2006

yesternium 

A new element in the periodic table that alters the past.
Specifically the past millennium.

80's radio announcer: Time travel to the past 1000 years in a jiffy is now possible thanks to the discovery of the element: yesternium!

yesternium by lilsnsh July 8, 2019