It's a proverb used to describe someone who is awkward, clumsy, or out of place in a sophisticated or elegant setting.
The imagery evokes a sense of the monkey being a creature of the wild, completely out of its element in the presence of a beautiful and refined woman.
Here's a breakdown of the phrase:
* Pehle-e-hoor: This means "in the presence of a beautiful woman."
* Langoor: This means "monkey."
The phrase is often used to poke fun at someone's social awkwardness or lack of grace in a particular situation. It's similar to the English expression "like a bull in a china shop."