The phrase "love language" refers to the way in which people express and experience love through verbal and non-verbal communication. It is a concept developed by Dr. Gary Chapman, which suggests that there are five primary ways in which people express and experience love: Words of Affirmation, Acts of Service, Receiving Gifts, Quality Time and Physical Touch. Each person has a primary love language, and understanding one's own and their partner's love language can help improve communication and intimacy in relationships.