off-off-Broad·way 
(ôf′ôf-brôdwā′, ŏf′ŏf-)
(ôf′ôf-brôdwā′, ŏf′ŏf-)n.
The theatrical productions in New York City that are performed in the smallest or least established venues, often featuring avant-garde or experimental works.
off′-off-Broadway adv. & adj.