the regrettes 

"the regrettes" is a kick-ass garage-punk band based in los angles, california. they are a predominately female group with a male drummer (drew thomsen). composed of four members, the band is lead by lead singer and guitarist, lydia night. with brooke dickson on the bass and supporting vocals, and marlhy murphy on backing guitar and leading vocals.

person #1: "hey, have you heard of 'the regrettes'"
person #2: "yeah, i saw them in a fender advert."
person #1: "yeah, i saw that too, but have you heard any of their music?"
person #2: " ofc, they f***ing rock."

the regrettes by tallgarden September 22, 2020

regretsenstrudel 

hilarious, joyous regret

Upon discovery that she had been running her entire life with exercise-induced asthma, Dominique felt a wave of regretsenstrudel wash over her like cloyingly sweet, suffocating relief.

regretsenstrudel by your other other mom August 26, 2013

regreteels 

When you have da feels because of your favorite character and regret (partially) loving him/her.
Pretty common in anime/game fandoms like Danganronpa.

"Man, I had so many regreteels with (insert character)'s death yesterday..."

regreteels by Nemurin October 15, 2016

Ragretness 

its a combonation of rage + regret + Sadness

"my mood is ragretness"

Ragretness by A gay hooman April 25, 2022