Munna is a word commonly used in South Asian countries like India, Pakistan, and Bangladesh to refer to a young boy or child. However, there are several synonyms that are used in different regions. In India, people use words like chhota, bachcha, nanha, and ladka to refer to a young boy. Similarly, in Pakistan, the word can be substituted with words like larka, baba, and janu. In Bangladesh, people also use words like putul, shishu, and chotto to refer to young boys. These synonyms are commonly used in everyday conversation and are considered informal. Regardless of the word used, the sentiment remains the same - a term of endearment for a young boy.