Aijoseizonsuki means: It is a term that means “To be happy about being sad”. This word is derived from Japanese words “Aijo”, “Seizon”, and Suki,” which are “Sadness”, “Being”, and “Like”. It was formed by combining the sentence “Aijo wa seizon sukidesu”, removing “wa” as well as the end of “desu,” and putting all the pieces together to create this word. You can enjoy sadness, much like Masochism. But instead of enjoying pain, you prefer to feel sad. (in Community Dictionary, added by Francisco Beltran)