Insults, I can do. Like:

You are a total fucking drooling moron.

Or, without profanity:

If I wanted to kill myself, I’d climb to your ego and jump to your IQ.

Honorable mention: 

What doen't kill you...disappoints me.

Well? Angry yet?

...no?

Alright, then.


[hider=The Whopper]
You are fat.

[img]https://i.ytimg.com/vi/vxNnUU3eRD0/maxresdefault.jpg[/img]
[/hider]