These are the meanest insults you can say without cursing
There are a lot of ways to insult someone that are very clever and creative and cutting WITHOUT resorting to profanity. You see, when you curse, some people see it as a sign of a LACK of intelligence, so what do you say to people when you REALLY want to cuss them out? Check out some examples:
Do you realize that people just tolerate you?
Now I know why everybody talks about you behind your back.
“I can explain it to you, but I can’t understand it for you.”
I treasure the time i don’t spend with you.
Pretty solid insults right there! The best insults are those that plant that little mental seed that make the person you're insulting have to rethink everything they think they know and alludes to their lack of intelligence. Ouch. More here