Here's a breakdown:
* Peng: A British slang term meaning attractive, cool, or desirable. It's often used to describe someone or something that is aesthetically pleasing.
* -est: A superlative suffix, indicating the highest degree of something.
* Hair: The strands that grow on the head.
So, "pengest hair" literally translates to "the most attractive hair".
It's important to note that this slang term is primarily used in British English, particularly among younger generations.