A movie flop is a film that fails to perform well at the box office. It can be either critically or commercially unsuccessful. The two crossword solutions for the term 'movie flop' are 'DUD' and 'BOMB'. 'DUD' is a slang term used to describe something that is not successful or does not work as expected. 'BOMB' is another slang term used to describe something that fails spectacularly. Both terms are often used to describe a movie flop.