Definition & Meaning of "brainrot"in English

What is the origin of the term "brainrot" and how is it used?

"Brainrot" is an internet slang term that appeared in the 2010s to describe mental decline, stupidity, or obsessive behavior caused by consuming low-quality content, repetitive media, or bad habits. The word combines "brain" with "rot," creating a vivid metaphor of the mind decaying from exposure to harmful or trivial influences. It is commonly used online in memes, social media posts, and casual commentary to humorously criticize oneself or others for overindulgence in certain media or patterns. The term is mostly humorous and informal, mildly derogatory, and context-dependent rather than a serious insult.