B-movie

[bee-moo-vee] /ˈbiˌmu vi/
noun
1.
a low-budget movie made especially to accompany a major feature film on a double bill.
Also called B-picture.
British Dictionary definitions for B-movie

B-movie

noun
1.
a film originally made (esp in Hollywood in the 1940s and 50s) as a supporting film, now often considered as a genre in its own right
Contemporary definitions for B-movie
noun

a low-budget movie