大雄不是神经病
[dà xióng bù shì shén jīng bìng]
This could reference 'Doremon', a popular manga cartoon character named 'Big Xiong' who is often misunderstood by others as being crazy ('neurotic' or 'insane'), hence it declares 'Big Xiong (Daremon) is not a psychopath', indicating a defense or understanding towards someone unfairly judged