12wū saai meih 烏嘴眉 — eyebrows all black; to get high on drugs (OS)
13wū sèuh sèuh 烏龜龜 — stupid, "brainless"; an ignorant person, a "know nothing"
14wū ying 烏蠅 — customs officers who conduct spot-checks on container lorries (truck driver jargon, ad 6.12.2001, A4)
15wū ying lāu máah meih 烏蠅撬馬尾 — flies gather on the tail of a horse; to break up a joint enterprise or relationship when neither party comes out a winner (sometimes used as a threat during a negotiation) (bmfy)