1Texas A&M University, 2University of Texas at Austin, 3Purdue University †Lead authors with equal contributions. ‡Core contributors. *Correspondence to [email protected], [email protected]. Media Coverage Outline of our work: (i) Inspired by the concept of Brain Rot, we establish the hypothesis of LLM Brain Rot; (ii) We construct junk and control data from Twitter/X posts for intervention; (iii) We benchmark four different cognitive functions of the intervened LLMs; (iv) We analyze the resul...