fuckingest adjective4 •(slang, vulgar) An intensifier.Cary came in, very gentlemanly, showed me the newspaper picture, and asked me how did it get out? I said, "I haven't the fuckingest idea." — 1990 •(slang, vulgar) superlative form of fucking: most fucking •(slang, vulgar) Most offensive, annoying or worthless.'And of all the fucking idiots, the fuckingest of all is Frank Rosen.' — 2011 •(slang, vulgar) Having or involving the most sex.She was the fuckingest, suckingest chick at the party. In fact, she blew so many of the guests that she passed out! — 2007