Regretsit 

The uniquely British emotion of feeling extreme unease following hasty, ill advised, possibly intoxicated decision making.

The German chancellor chuckled quietly to herself. Her schadenfreude could not be contained as she contemplated the regretsit experienced by those ungracious, tea swilling, island folk.

Regretsit by @peSh!t crayzee July 11, 2016

age regression 

Age regression is when somebody reverts to a child-like state of mind, often as a coping mechanism for things like PTSD, depression, anxiety, and other mental health issues. Basically age regressors are more at-peace and worry-free whilst in "little space" (A term for when one is in said mindset). These people simply need breaks from the stress of being old and often have a childish personality even outside of regression (Though sometimes it's not as obvious).
Contrary to popular belief, age regression is NOT a kink or even related to sexual intercourse whatsoever. Some age regressors refer to themselves as littles and to their significant other as "Daddy", "Mommy", or just as their "Caregiver" Since they'd typically take care of their "Little" as if they're an actual child.

Hey, so why does she sleep with so many stuffed animals? Oh, she's just an age regressor. How cute!

Bro, what's with the pacifier? You a baby now or something?
Kinda, I'm regressing right now.
Sorry, I didn't know! That's cool!

Why does your blog have so much pastel And childish stuff?
Oh, it's an age regression blog. Nice!

age regression by Possibly a demon child February 26, 2017

regressive left 

A term coined by anti-extremist activist Maajid Nawaz, to describe far left zealots who defend and support extremist ideologies, cultural and religious relativity and pander to absurd sensitivities. You'll often find these SJW type plonkers screaming racist or bigot at anybody who dares challenge their one size fits all view of the world.

The regressive left are generally Guardian readers

regressive left by Trihomoclops January 12, 2016

Age Regression 

Age regression is a psychological state in which someone's mindset will go into a previous state for a period of time. They will feel, think, and behave younger, most commonly as a toddler or little kid.
Age regression is a coping mechanism and can be involuntary or voluntary. It can be used to cope with past/current trauma, mental or physical illnesses, general stress, and so on. It can also be used as a coping mechanism for those who've had missed or bad childhoods or who experienced forced maturity as a way to positively relive or reclaim that part of their life. This type of coping mechanism is suggested by some therapists, and accepted or encouraged by many others.

Age regressors may have a caregiver to assist them in their regression and care for them when in that state of mind. This can be anyone - their significant other, close friend, sibling, parent, etc.
Sometimes age regression is sexualized or mistaken as age play (role playing as a younger age, often for sexual purposes) but it is actually potentially illegal to have sexual activity while regressed or with someone who is because it makes the regressor unable to consent, due to impairment of cognition. Age regression should not be sexualized because it's on the same level as sexualizing a biological child.

I experience age regression.
I am an age regressor.

Age Regression by erinz10 October 21, 2019

Regressive Rock 

A style of music that emerged in the 2000's. Regressive Rock is commonly characterized by relentless use of 4/4 time, unimaginative lyrics, mundane 4 minute verse-chorus-verse-chorus-bridge-chorus song structures and lengths, and generally untalented musicians. Instrument choice is limited to guitar bass and drums.

Also sometimes called "Reg Rock"

Nickelback is a great regressive rock band, they're so brilliantly unimaginative!

Regressive Rock by Leifenhausen March 22, 2010

Regression Monkey

An academic whose research consists of the stata commands reg, ivregress, robust, and vce().

The term is a reference to the old adage, "Infinite monkey theorem", that a million monkeys randomly typing at a million typewriters would eventually produce Shakespeare. To understand the term, just replace typewriters with "computers with stata" and shakespeare with "insightful economics."

A Regression Monkey hitting keys at random on a computer with Stata for an infinite amount of time will almost surely type any given text, such as the complete works of insightful economics.

Regression Monkey by Reg Monkey August 5, 2019

No regrets 

The good feeling you get that follows you doing something really good or doing something you probably shouldn't have.

*Side effects of the second senario may result in some or many regrets at a later date.

1. I'm proud of what I did today. I tried my best, no regrets.

2. (After doing something crazy) That was awesome. I can't believe I did that, no regrets!

No regrets by GhostWriter429 August 11, 2016