Hooroo is an informal Australian slang word used to bid goodbye or farewell to someone. It is used mainly in casual conversations between friends and family members. Although this popular slang term is commonly used, it's important to know other synonyms for hooroo. Some of these synonyms include "see you later," "farewell," "goodbye," "catch you later," "take care," "until next time," "later," "adios," "ciao," and "cheerio." Each of these synonyms has a slightly different nuance in tone and context, but they all express the same sentiment of saying goodbye. So, whether you choose to use hooroo or any of its synonyms, always remember to say farewell with kindness and sincerity.