That phrase, like many similar ones, tells you more about the person using it than the person it's about.
However - many of us on this site have spent time in a foreign country, some of us live in countries where we have to use a second language. I have been grateful to quietly look up meanings in a dictionary - even if they are insulating or rude, I want to know what they mean, so I can avoid them or act appropriately.
Many years ago, as a community nurse I visited a family where the father used F! every other word. he had learned his English alongside National Servicemen, then worked on building sites, and really didn't know the context. Because his child was ill and he needed to deal with healthcare professionals, it was me who ended up telling him - and he made me a beautiful cake to say thank you (having previously, quite politely, asked me if I wanted a F...cup of coffee!)