What insults have you received in your life? Which ones were impossible to ignore?

This question is inspired by another recent one about insults online. It made me think about the line a person may feel they have to draw in the sand. Which words can they ignore, and which ones force them to defend their honor?

Personally, I feel like it’s more important to live to fight another day than it is to defend my honor (such as it is) against every insult I receive. And if I do defend myself, I try to use a kind of honor jujitsu. Bend, bend, bend, and slip away.

So I’m wondering if you could describe a smattering of insults you’ve received in your life, and talk about ones that you could not ignore. Why could you not ignore them? What would happen if you did ignore them? What did you believe was at stake? How did you respond to the insult that went too far?