yasterday 

The day before yesterday; two days ago.

I was supposed to feed the dog yasterday!

yasterday by Jimmy Hansen January 16, 2006

Yesterday X Separation

Yesterday X Separation (Korean: 옛델대 뷔 셉알앋이온, stylized YESTERDAY / SEPARATION), commonly known as YXS, is a five-member Kwangyanese boy band formed by Throw It Back Rosie Entertainment. The group consists of five members Stoove, Yeoniel, Bengyu, Taerry and Kaimal.

Naega Byeonhae by Yesterday X Separation outsold the whole K-Pop Industry.

Yesterday X Separation by jenlisaforever January 26, 2022

2 of 'em Yesterday 

A business term meaning you want Lots of them as soon as possible.

"2 of 'em" refers to the item and means you want lots of the item.

"Yesterday" means as soon as possible.

We need those clothes fast. 2 of 'em Yesterday!

2 of 'em Yesterday by TheGymRat February 27, 2019

Yesterday's Gravy 

Old news; something that has fallen out of trend

Stranger 1: "Hey! Did you hear about that movie that came out last Friday?!"

Stranger 2: "That's yesterday's gravy bro."

Yesterday's Gravy by Hellbound Harry March 30, 2015

Lasterday 

The word you use when you are talking about something that happened in the recent past, but you can't remember the exact day (due to a black out), or it really doesn't have any significance to the story...or you just can't be bothered to think hard enough to remember it.

Amber: I just went to a Ween concert in Anaheim.
Penny: Really, when was that?
Amber: Lasterday, I think.

Lasterday by DeedleDawn October 7, 2009

Lasterday 

The day before yesterday.

Today is tuesday, which means Sunday was Lasterday.

Lasterday by Teatime777 December 28, 2015

Lasterday 

Any day prior to the present day.

Remember lasterday, when you were born and then started driving.

Lasterday by Angelpie November 27, 2012