Regretgasm 

An orgasm that is immediately, or soon thereafter, regretted upon, as you were having sex with someone you should not have been having sex with.

I bumped into my bitch of an ex-girlfriend, and it ended with a solid regretgasm. I even yelled "NOOOOO" as I came, realizing my mistake.

Regretgasm by Nigel Fish May 18, 2006

Regretamine 

Feeling you get the morning after throwing up/ falling over/ talking to the wall about the universe being made out of segments on account on having over-indulged in the drug ketamine.

I thought I threw up on my front doorstep last night, but when I came round I realised it was my flatmate's bed. Major regretamine.

Regretamine by Maryapple May 7, 2009

regretfast

When you pack a lunch but eat it well before noon, due to boredom or anxiety, screwing up your eating schedule for the rest of the day.

Can you lend me some cash for the vending machine? I brought a sandwich to work but ate it for regretfast at 10am.

regretfast by very_clever_pseudonym October 1, 2021

Regretamin

Doing lots of ketermine and popping in and out of the hole aggresivelly.

Phil " I managed to turf through a whole gram of the mine last night on my own, dude am i regretamine'ing this

Regretamin by JRF17 December 14, 2010

regretamin

Another derogatory term for ketamine. specifically denotes a k sesh that results in embarrassment or regret.

"Bobby mate how'd you get all those fag burns on your face??"
"errrr.....that'll be the regretamin"

regretamin by mandingo89 July 25, 2009

Regrettameal 

A meal you instantly regret eating. Can be because of nutritional makeup, or the presumed havoc it will wreak upon your digestive tract, or any other reason.

I was hungry so I got the 2 for $5 deal at burger king and ate two whoppers. It was a regrettameal.

Regrettameal by TommyB33 May 8, 2014

regretamine 

like forgetamine, another word for Ketamine, the drug. A strong narcotic, ketamine use can develop slight feelings of paranoia or a sense of regret.

I wish I hadnt done so much regretamine last summer I keep forgetting stuff.

regretamine by theoriginalMax May 28, 2007