n. (Informal) outdated thing or custom; person that is no longer popular or esteemed; person or thing that is no longer a news item or topic of conversation (e.g. "I don't know who the second guest was - he is some has-been television star whose name I don't really know")
HAS-BEEN
Meaning of HAS-BEEN in English
Explanatory English dictionary bed edition. Толковый словарь английского языка Редакция bed. 2012