ヤー公こうMeanings1nounyakuza; gangsterderogatoryslang›Derogatory slang term for a yakuza member, often used with contempt or in rough speech. The suffix 公 adds a pejorative tone.See also: やくざあの辺あたりはヤー公こうが多おおいから気きをつけろ。Watch out around there; there are a lot of yakuza.ヤー公こうに絡から