屎淋尿瀨 [－－－濑]

Jyutping si2 lam4 niu6 laai6
Pinyin shǐ lín niào lài

Definitions (CC-CANTO)
  1. to be extremely scare or surprised/ shocked; sloppy
Definitions (粵典–words.hk)
  1. 形容詞
    形容​驚得​好​緊要​，​差​唔​多​要​失禁
    very scared; literally: poop splashing and pee rushing out