I'm not entirely sure as the term is rather specific. It could potentially be about a story ('fanfic' - fan fiction) that has something to do with a small glitch and is anti - perhaps against a certain idea, character, or fandom trend. But without more context, it's hard to say precisely.
There are also stories of objects disappearing and then reappearing in strange places. A person might put their keys on the table, turn around for a second, and when they look back, the keys are gone. After searching everywhere, they suddenly find the keys in a completely unexpected location, like inside a closed drawer that they are sure they didn't put them in. This gives the feeling that the fabric of reality had a momentary lapse.
A top story could be about a person who was driving on a familiar road and suddenly everything looked different for a split second. The landscape changed, the signs were in a different language, and then it all snapped back to normal. Another might be about dreams that seem to predict the future in a very precise way, which some think is a sign of a glitch in the matrix. Also, there are stories of people having out - of - body experiences during which they perceive the world in a way that defies normal understanding, and these are often considered as potential 'glitch in the matrix' scenarios.
One interesting glitch back story could be from a video game. For example, in an old racing game, there was a glitch where cars would sometimes drive through walls. It happened because of a miscalculation in the collision detection code. Programmers had to dig deep into the code to figure out how to fix it.
One scary glitch in the matrix story is about a person seeing the same stranger in completely different and unexpected places within a very short time. For example, first seeing the person in a crowded city street, then minutes later in a small, isolated alley on the other side of town as if they teleported there.
One 'glitch in the matrix' story is about a person who repeatedly saw the same stranger in different cities at the exact same time of day, always in the same pose. It was as if it was a recurring scene that wasn't supposed to be there.
There was a case where a woman entered a store she had visited many times. But this time, the layout was completely different in a way that defied logic. The aisles were in new places, and products were stocked in an entirely unrecognizable manner. It was like she had stepped into an alternate version of the store for a short while. This could potentially be seen as a glitch in the matrix.
Maybe there's a scientist character who is trying to study and understand the glitches in time. This character could be really smart and dedicated, using their knowledge to try and solve the mysteries related to the time glitches.