見五姑娘 [见－－－]

Jyutping gin3 ng5 gu1 noeng4
Pinyin jiàn wǔ gū niang

Definitions (Wiktionary)
  1. verb, idiomatic, slang
    to jack off
    (syn.) 见伍姑娘, 打飛機, 打飞机, 見伍姑娘