If the woman over 50 is your grandmother, go ahead. Otherwise, a lot of people would find it kind of like calling someone an old hag. And 50 really isn't considered very old. Generally, you shouldn't need a specific term to refer to a person of 50. If you just mean something to address them by, 'ma'am' is fine.

In the United States, the term "granny" is commonly used as an affectionate term for one's grandmother. However, when applied to women who are not one's grandmother, especially those around the age of 50 or older, it can be perceived as offensive or demeaning. This is because "granny" may evoke stereotypes of elderly women who are frail or out of touch, which many women in this age group do not identify with. As noted in a discussion on age-inclusive language, terms like "granny" can be patronizing and fail to respect the individual's identity. To address women aged 50 and above respectfully, it's advisable to use neutral and age-inclusive terms. Phrases such as "older adult," "older person," or simply "adult" are appropriate. These terms acknowledge age without imposing negative stereotypes. It's essential to be mindful of the language we use to ensure it reflects respect and inclusivity.

"Granny" is not inherently offensive in American English, but it depends on context. It is typically used by grandchildren to refer to their grandmother, but calling any older woman "Granny" could feel patronizing or old-fashioned. For a respectful term, use "ma'am" (formal), "Ms." + last name, or just their name. If referring to age in a positive way, "senior," "older adult," or "mature woman" is neutral. Avoid words that might suggest frailty unless the person embraces them.

My children call their grandmother "Granny" and it is not offensive in that context. The character on "The Beverly Hillbillies" is a beloved and iconic character from American TV. I could see that it could be unkind to call someone granny in order to imply they are old or slow, but it is not only an insult. Your could always call a woman over 50 Ma'am. The person would have to be looking to be offended if they are bothered by Ma'am.

Yes, it is strange and even offensive to call someone “granny.” The best word to use for a woman aged 50+ is simply “woman.” If I want to be more descriptive, I might say “older woman.” Be careful not to say “old woman,” which is just as impolite as calling someone “granny.”