Here is an explanatory text regarding that topic: The Legacy of "Twist and Shout" and the "Shame4k" Phenomenon
In fanfiction history, few works have achieved the legendary—and notorious—status of Twist and Shout , a Supernatural alternate universe (AU) story by gabriel (with significant input from standbys). Written in 2009, the fic reimagines Dean Winchester and Castiel as star-crossed lovers in the 1960s, culminating in a devastatingly tragic ending involving AIDS, loss, and heartbreak. It is widely considered the ultimate "hurt no comfort" fic. shame4k twist and shout
It sounds like you're referring to the infamous fanfiction by gabriel (sometimes associated with the "Shame4k" tag or sentiment within fandom spaces). Here is an explanatory text regarding that topic:
Alongside its fame grew a strange, self-deprecating fandom ritual: the tag or expression. This phrase emerged as a tongue-in-cheek badge of honor among readers who had been emotionally destroyed by the story. To say you had "Shame4k" meant you had read Twist and Shout , likely sobbed uncontrollably, and felt a peculiar mixture of embarrassment ("shame") for being so affected by a fanfiction, and awe for the sheer power of the writing. It sounds like you're referring to the infamous