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Teach fish how to swim (班门弄斧 / 教鱼游泳) — Chinglish Slang

📌 Quick Overview | 词条速览

Slang Name:Teach fish how to swim

Chinese:班门弄斧 / 教鱼游泳

Type:Daily Life / Chinglish Slang

🔎 Full Meaning | 完整释义

English:
To teach someone something they already know well; to show off in front of an expert

中文:
班门弄斧(在鲁班门前耍斧头)

📜 Origin & Background | 词源与文化背景

Variant of Chinese idiom "班门弄斧" - showing off axe skills at carpenter Lu Ban's door

📖 Example Sentences | 双语实用例句

📌 Example 1
You're teaching fish how to swim by correcting his grammar!

🔗 Related Chinglish Slang

✍️ By Chinglish Lab Team · 📅 May 5, 2026
#Chinglish #DailyLife #ChineseEnglish

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