What does whaa mean in baby language?

Why babies go 'Whaa'

In baby language whaaa (otherwise known as 'whaa') can signify the baby wanting something or lack of sleep (for the baby)

So if the baby is tired the baby will cry (whaa) to let it's mother know that it wants to sleep!

Another example is, if the baby is hungry or thirsty it will cry to tell its mother.

Although all cries sound the same, the mother of the child will soon find out what the baby wants, it may just be a simple hug, or maybe the baby has pooped its pants!!!