1. someone who has wild fantasies; someone who hears voices; someone who is crazy
Wikipedia definition
2. Denpa, also denpa-kei or denpa-san, is a Japanese term for individuals who are disconnected or disassociated from the people around them. They may entertain wild fantasies or other strong beliefs, and their speech or actions may seem strange or incoherent to outside observers. Denpa literally means "electromagnetic wave", and the original sense of denpa-san was of someone who thought they were receiving voices, thoughts, or instructions directly to their mind via electromagnetic radiation.
Read “Denpa” on English Wikipedia
Read “電波系” on Japanese Wikipedia
Read “Denpa” on DBpedia


to talk about this word.