Hasid is a kind of religious practice that comes from the Jewish tradition. It's based on the teachings of Rabbi Israel Baal Shem Tov, who lived in the 1700s. Hasidism is a way of worshiping God and living a full and spiritual life. People who practice Hasidism try to bring holiness into their lives by living according to the teachings of their Rebbe (the leader of their Hasidic community) and studying and praying regularly. They also follow strict rules, like wearing modest clothing and keeping kosher.