Out of someone's mind/Out of someone's head
Meanings of "Out of someone's mind/Out..."
To be anything from crazy , to insane, to delirious, or not thinking rationally temporarily or long term. slang. Someone who is effected by emotions could be, as well as someone who is diagnosed insane. A person who is effected by powerful urges as well. Someone could be 'out their mind' for chocolate cake. Meaning obsessed beyond what might be considered as normal. Someone in love might be said to be out of their mind, out of their head over another. They are not acting normally for themselves.