Brain Rot (expressive phrase)-A term to convey the feeling of one's IQ lowering or brain degrading/decomposing due to a video, picture, TV show, movie or other viewable/hear-able thing that has very little or no intelligence.
Uhm...4chan isn't exactly what I had in mind when writing the Brain Rot definition, but I guess that works...I think it was Ricky, the horrible Rocky ripoff, especially the actual boxing scene. Angry Video Game Nerd Review: http://www.youtube.com/watch?v=NpMxy_ydnMM