插針都唔入 [－针－－－]

Jyutping caap3 zam1 dou1 m4 jap6
Pinyin chā zhēn dōu wú rù

Definitions (CC-CANTO)
  1. very tight / narrow; over crowded; describes a woman who is sexually unresponsive [colloquial]
Definitions (粵典–words.hk)
  1. 語句
    用​嚟​描述​一個​地方​人多​擠​逼
    used to describe a crowded place; literally: too tight to put a needle in