可不是
kěbùshì
Examples
白粉可不是好東西,離它遠一點!
Heroin isn't a good thing. Stay away from it!
Source: Tatoeba
他這次測驗不合格可不是開玩笑的。
His failing the test is no laughing matter.
Source: Tatoeba
“今天够热的” – “可不是, 比昨天热多了”
"It's so hot today." "Absolutely, even hotter than yesterday."
Source: Tatoeba