臨天光瀨尿 (lam4 tin1 gwong1 laai6 niu6) — to fail when success is within grasp (lit., "to wet the bed just before sunrise") in Cantonese
lamˎ₄臨tinˉ¹天gwongˉ¹光laaiˍ₆瀨niuˍ₆尿简 临天光濑尿
Mandarin Pinyin: lin2 tian1 guang1 lai4 niao4
Meaning of 臨天光瀨尿
nounto fail when success is within grasp (lit., "to wet the bed just before sunrise")
nounwetting the bed close to sunrise; cannot persist till the end (slang)