The Boston Underground Film Festival (BUFF) is an annual event held in the Boston area that specializes in alternative film and video. BUFF is the largest underground film festival in New England, spotlighting short films and feature-length films that would not otherwise find an audience. It was the only film festival in the world to give an award for "Most Effectively Offensive" films, an accolade it awarded from its inception until 2017; on the festival's twentieth anniversary, the award was retired and replaced with "Best First Feature Film," marking a shifting focus towards celebrating new voices in filmmaking.