It could possibly refer to:
* "Bandar" in Malay, which means "monkey" or "town", and "mama" which is a common term for "mother" in many languages.
* A specific slang term from a certain region or culture.
To give you a more accurate meaning, please provide more context:
* Where did you hear this phrase?
* What was the situation?
* What was the speaker trying to convey?
Once I have more information, I can give you a more accurate translation or interpretation.