Question

kakkoii sensei desu means?

Answer 1

The phrase "kakkoii sensei desu" (かっこいい先生です) translates to "He's/She's a cool teacher" in English. "Kakkoii" (かっこいい) means "cool" or "stylish," "sensei" (先生) means "teacher," and "desu" (です) is a polite ending that adds affirmation.