Bittman John "Bimbo" Rivas (November 11, 1939 – May 21, 1992) was a Puerto Rican actor, community activist, director, playwright, poet, and teacher who lived in the Lower East Side of New York City. He also served in the U.S. Air Force. He was one of the pioneers of the Nuyorican Movement and was involved in the Nuyorican Poets Café.