movie fanatic; film buff; cinema enthusiast
Implies an intense, almost obsessive love of movies, stronger than a casual fan. Often used for someone who watches a huge number of films or is deeply knowledgeable about cinema.
He's a movie fanatic who watches 500 films a year.
My uncle, a film buff, introduced me to many old classics.
Compound of 映画 (movie) and 狂 (madness, fanatic). The suffix 狂 is used to indicate an extreme enthusiast, as in 釣り狂 (fishing fanatic) or 仕事狂 (workaholic).