瓶頸 (ping4 geng2) — bottleneck. Cant. coll.: 樽頸 in Cantonesepingˎ₄瓶gengˊ²頸简 瓶颈Mandarin Pinyin: ping2 jing3Meaning of 瓶頸nounbottleneck. Cant. coll.: 樽頸