If you offended by a simple tweet then r/roastme is not for you. Here peoples let users roast them and user roast them with extream brutalness.
Well, you want to see savage burns on people then it is a perfect place for you to wast some time.
You have to brave enough to place your photo of yourself and ask people to roast you because people will roast you with some serious insults you never imagine of.
Here are some of the best for Reddit thread r/roastme.