I think that you came up with a good term, that was not insulting or degrading, and that you did it quickly and under pressure. This is an example of the unexpected situations that nursing can thrust us into. The person you were speaking to did not take offense to what you said and even if she had then she could have supplied a term that she preferred. In nursing we have to ask questions about sex, drug use, bowel pattern, we do not have to and cannot come up with euphamisms.