The search results do not provide a clear answer to the question "what ta fa." The results include several different meanings for the individual terms "TA" and "FA," such as Temporary Assistance and Fundamental Analysis, but there is no clear meaning for the phrase "ta fa" itself. Additionally, the results include information about the vulgarism "watafak," which is a variation of "what the fuck" used to express surprise or disbelief. However, this is not the same as "ta fa." Therefore, it is not possible to provide a comprehensive answer to the question based on the search results.