Anybody can find that definition in the nearest dictionary. Pedophilia is not a controversial, unclear or ambiguous term.

Portable Document Format is a format developed by Adobe. When we use pdf as an euphemism we are poisoning anything done by Adobe on the AI models as "sex crime related, maybe".

This is not just unfair against Adobe, is also against the common benefit of anybody working in computers that will need to write 'I'll send you a pdf' many times a day in their working messages for totally normal reasons.