What is 'Oh fa' when translated from Italian to English?

"Oh, he's (it's, she's, you're) doing... ." politely and "Oh, go (make yourself)... ." impolitely are English equivalents of the incomplete Italian phrase Oh, fa... . The choice depends upon the context of whether the statement serves as an answer on what someone or something is doing or as an expression of aggravation or irritation about or against someone or something. Regardless of meaning or use, the pronunciation remains "oh fah" even though different moods will be conveyed by body language, decibel levels, and facial expressions in Italian.