Regrettables 

Regrettables consist of dirty sluts, girls who are a friends girlfriend, and fat chicks. Basically, they are people you would regret banging in the morning and are hence very dangerous at parties.

"DAMN SON! That party is 99% regrettables! I ain't going to that shit!"

Regrettables by Guaresca January 23, 2009

Regrettable Hulk 

A regrettable hulk is a very large hulk sized fat woman that takes advantage of an intoxicated man sexually. Regrettable hulks are solitary hunters and prey on men typically around bars and clubs when they are about to close.

"Yo Bruce, hope you didn't throw your back out last night with that regrettable hulk."

Regrettable Hulk by TheLoganator September 3, 2014

Regrettable 'Like' 

(Verb): The feeling of annoyance one gets when they like a status or photo via Facebook then later they receive a large amount of notifications from others commenting and/or liking the same thing.

Jim: Ha ha ha, that's a funny picture from last night..."likes"
(Hour later)
Jim: Woah, 37 notifications all having to do with that picture...that was a Regrettable 'Like'

Regrettable 'Like' by PandaPat89 April 18, 2010

a regrettable waste of energy 

i feel like a broken record writing this again and again
communication that exclusively relies on written words can never be complete.
if we're missing out on hearing, sensing, seeing the other, we are ignoring essential elements of mutual understanding.
how do you mark a joke, sarcasm, irony, criticism, reproach if not with tones of your voice, mimic, gesture. how can i make you feel all the love in my heart when im locked out. when i won't be heard out.

failed communication is such a regrettable waste of energy when what you write goes misunderstood, misinterpreted, mistaken. even the knowledge that its you im writing to cannot prevent that.
do you know what i mean.

a regrettable waste of energy by Krkič February 27, 2021

Regrettable fuck 

A person who you have or have not had sex with, which is or ends up being regretted

Person 1: Hey I have a friend and we ended up fucking
1 week later
Man I really regret that!

Extra: Man! She looks like a regrettable fuck!

Regrettable fuck by JohnLongshlong January 30, 2021