Yeester 

A yeester is when a friend repeatedly punches you in the anus as hard as they can vigorously, similar to sheester in which one repeatedly slaps a males balls with the metal end of a fly swat.

Jordan: "last night I was in the bathroom and Malachi kicked down the door and yeestered my until my butthole turned purple and green."
Mason: " well he sheestered me in my sleep so hard that he scared the crabs back up into my stomach hair."

Yeester by Speedythecrackbaby December 8, 2018

yestermorn 

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

What time were you up yestermorn

yestermorn by JimJams June 5, 2007

Yestereve 

The evening of the previous day.

"Did you watch that program about fatties yestereve?"

Yestereve by kezuke June 18, 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

yestereve 

Yesterday evening. Similar to 'yestermorn' and 'yesternoon'

Did you have fun yestereve?

yestereve by JimJams December 27, 2008