龍精虎猛 (lung4 zing1 fu2 maang5) — fit as a fiddle in Cantonese
lungˎ₄龍zingˉ¹精fuˊ²虎maangˏ₅猛简 龙精虎猛
Mandarin Pinyin: long2 jing1 hu2 meng3
Meaning of 龍精虎猛
nounfit as a fiddle
noun(slang) (of person's constitution and health) full of strength and energy; to be fit as a fiddle