What's "flood brain" mean?
Native speaker’s answer
Rebecca
To "flood one's brain" or "flood one's mind" with something means to have one's head filled with thoughts about something so that it feels excessive. Ex: The memories flooded my brain when I went through the photo album. Ex: My mind was flooded with everything I had to do. So I couldn't think clearly. Ex: The media can flood our brains with negative thoughts sometimes.