tastyという単語の「美味しい」の意味はただの習慣。綴りをよく見れば taste- y 「味の」。だから良い味でも悪い味でも、ああこれはtastyだ、と言える...と。テーブル上の料理について「Tasty（美味しい/まずい)!、Tasty（美味しい/まずい)!」

He talked about the word "tasty." He said,"'Tasty' normally means something has a good taste and is yummy. But the word itself just means 'related to taste.' The '-y' at the end makes it describe a taste. So you can use 'tasty' for a bad taste too, not just good tastes.