I'm guessing that this is some Dutch colloquialism that doesn't translate.
I could have sworn that one existed in English too. Guess not. Don't you guys use the expression : "to step on one's toes" when you insult someone?
Over here we use the expression "to have long toes", and it means "to be easily offended". (it's obviously derived from the former expression)
Like you have to be *very* careful of what you say to those kind of people, because if there's *any* chance of them taking it the wrong way, they most likely will.
I really hate those kind of people. Taking themselves WAY too serious, and not an ounce of humour whatsoever.