Natasha. Istredd says with a sigh. It was slightly embarrassing and he got very flustered, but she was kind about it. He even laughed about it later. He didn't want to ask anyone else, having to focus on people from an "earth" similar to Lucifer's.

Very rude to have me ask someone else so she knows I'm apparently thirsty. It's not a term that he would have really understood on his own. It was frustrating because he felt he could get it through context, but it just didn't sync up in his head.