아이스 아메리카노 마셔도 (ai-seu americano ma-shyeo-do)
왜 더 후끈후끈하니 (wae deo hu-kkeun-hu-kkeun-ha-ni?)
Even though I'm drinking iced americano
Why am I still so hot?
It means "warming up with hot energy!"
So next time you're sitting at home and even with the AC on or a cold drink you can feel your body still heating up, you can say it is 후끈후끈하다 (hoo-kkeun hoo-kkeun-ha-da)