The 'My Cum Collection' meme is a staple of internet shock culture, primarily rooted in the infamous 'Pony Jar' threads from 4chan boards like /mlp/. The original concept involved a user documenting the filling of a mason jar containing a figurine, which became a legendary tale of internet depravity and obsession. Over time, the phrase and imagery have been adopted by irony-posting communities to signify anything ranging from a bizarre hobby to a self-deprecating joke about niche interests. In its modern meme usage, creators often swap the 'collection' for harmless items to subvert the expectations of those familiar with its dark origins.