lǎu-sia̍k-chiáu老宿鳥

wily old fox

wily old fox; old campaigner; experienced person who is slick in dealing with things

English Wiktionary, “老宿鳥” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%80%81%E5%AE%BF%E9%B3%A5 · confidence: Medium (Wiktionary)