Poetic justice British formal
He is a scammer and a liar, now he's in prison. That's poetic justice
The kind lady that collects garbage just won a lottery card. The goods was rewarded which was poetic justice
To complain that something is unfair or illegal.
The phrase 'Poetic Justice' was coined by the The English literary critic and historian Thomas Rymer in his essay The Tragedies of the Last Age Considere'd, published in the year of 1678. He demanded that characters in poetries and dramas to have to justice that they deserved, which is the good will be rewarded, the evil punished. He also supported the opinon that plots should be plausible and that there should be a moral in the dramatic works.
If someone has a cast iron stomach, they have a strong stomach that can digest unusual food and even bad food without being ill.
Jimmy must have a cast-iron stomach, when he drank milk with lime juice and felt perfectly fine afterward.