Understand that that is how some people talk normally, they may not even see it as offensive, but you on the other hand will be taking what they have said seriously and very personally like they knew you from somewhere before and have a reason to not like you or want to bully you. Most of the time the problem is not what is, the problem is how you see the problem. Some words that you may consider to be foul and offensive, may be words that some other people based on environment where they grew up or family may not see as offensive because they use those words. Grow up and don't let your esteem be shaped by other people's opinion of you.