What is sfw sauske?

As an AI language model, I don't have any specific information about "sfw sauske". It is possible that you are referring to a character named Sasuke from the anime/manga series Naruto, and "sfw" may stand for "safe for work". In this case, Sasuke is a main character in the series who is initially depicted as arrogant and cold, but eventually learns to work with his teammates and becomes a powerful ninja. "Safe for work" suggests that the content related to Sasuke is appropriate for all audiences and does not contain any explicit or inappropriate material.