ほんばんこうい 本番行為 LinksSentence search for 本番行為Sentence search for ほんばんこういKanji details for 本, 番, 行 and 為Edit in JMdict Noun1. sexual intercourse (esp. with a prostitute); actual sex (in movies, etc.)Slang, See also 本番 ほんばん Discussions Log in to talk about this word.