I suppose this would be an IMHO topic, but I’m guessing it will get at least a PG-13 rating soon.
The insults a lot of people use are the ones they are most sensitive about.
I won’t call a person juvenile, but I will call him old, the word that always rakes my pride.
Pussy whipped hurts, as do the failure-related insults.
I can easily ignore the ones about low IQ as unreal, but when someone says he expected better of me, he’s going to get something nasty in return. That’s too close to home.
The one that always gets my enemies mad, but requires waiting for an opening, is when he relates something he did wrong, such as mistakenly sucked up to the author, thinking he was the producer. Then I say:
That sounds like something you would do.
That line has always produced the reddest face, and greatest loss of composure, although I can’t say exactly why.