"Head Over Heels" is a phrase used to describe a state of being deeply in love or infatuated with someone. It conveys a sense of overwhelming emotion, where a person feels as if they are turned upside down by their feelings. This expression often suggests that love can be both exhilarating and disorienting. The phrase has also been popularized in various forms of media, including songs and movies. For example, the song "Head Over Heels" by the band Tears for Fears captures the essence of falling in love, highlighting the joy and intensity that comes with such powerful emotions.