Derja translation of 'خْرِفْ'

he lost his mental abilities, go senile

When he grew old, he became senile and started to make up things when talking with us. كيف كبر خرف وبدا يخلوض علينا

he became irrational

Has he gone crazy or what? He's saying things that don't make any sense at all. ياخي خرف هاذا والا شبه، يقول في كلام موش منطقي جملا وحدا