yesterboy 

the boy of yesterday; ex-boyfriend

Friend: So girl, how did your date go?
Girl: Ha, good but not, I got high and think I may have hurt him...
Friend: Ahh...so he is now yesterboy!!
Girl: Time to go make a yestergirl!!!!

yesterboy by bodyheat May 26, 2011

yestermorn 

Yesterday morning. Similar to 'yestereve' and 'yesternoon'

What time were you up yestermorn

yestermorn by JimJams June 5, 2007

Yesternoon 

Yesternoon is the afternoon of the day before

Brandon got that booty yesternoon
Josh tapped that ah yesternoon
Yesternoon the blondie witta booty twerked at Eli's

Yesternoon by Play wit it July 4, 2014

yesternoon 

Yesterday afternoon. Similar to 'yestermorn' and 'yestereve'

What did you do yesternoon?

yesternoon by JimJams June 5, 2007

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