I think it’s a pun on the famous press article, titled “J’accuse” (“I accuse” as in I accuse you of doing something), writty by renown author Emile Zola in 1898. In it he took a stand to defend Alfred Dreyfus, a french officer wrongly accused of spying for Germany because he was jewish. But “J’accuse” really doesn’t sound like jacuzzi in French though…

I just love a multilingual portmanteau!