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
あの辺りはヤー公が多いから気をつけろ。
Watch out around there; there are a lot of yakuza.
ヤー公に絡まれたことがある。
I've been hassled by a yakuza before.
Derived from ヤクザ (yakuza) with the derogatory suffix 公 (こう), which is often attached to nouns to express contempt or familiarity in rough speech.