regretfull 

In the state of being sorry, repentant, or upset regarding the amount of food one has placed in one's belly, thus filling it with both deliciousness and regret.

Ex: They were all seriously regretfull after consuming enough food at Thanksgiving to feed a small village for a week.

regretfull by ebbb November 27, 2012

regretful 

feeling sorry for thing one has thought, said or done

I truly feel regretful for an enormous amount of things I've done and said; but no longer want to feel wronged, especially by people I barely know.

regretful by PineappleJuice March 8, 2015

Regretful digestion 

The act of eating an item of food with the hopes of it tasting good, only to find out that it's horrible and you've wasted your time and money and tastebuds on the food.

"Hey Connor, how was that beef liver you had last night?"

"Aw man, it was nasty! I gave me a serious case of regretful digestion."

Regretful digestion by Myocarditis July 19, 2018

Regretful retrogression 

When you hold a repeating error, in your mind. That you won’t forgive yourself for, because you realize against your better judgement. Thinking less of your self, your relationship with your significant other you made a decision that have abruptly affect all future experiences for love to fall short from the one true.

This pain I hold so deep because of my family’s views and how society would view us a whole that I have a gaping whole in my chest bellowed with Regretful retrogression.

Regretful retrogression by Titus dyfilid February 15, 2019

Regretfullness 

To have more than regret

Breanna, the regretfullness is going to come back to you

Regretfullness by 乔纳森78 November 10, 2019