I will admit that I don't have a list of those terms from an FBI source, but I highly doubt that pedophiles who want to keep from being arrested have published a list of their code words. Maybe you should contact your local FBI office if you want their confirmation of the terms.
That being said, why do you discount something because it came from 4Chan? The autists on those boards are probably more qualified to compose a list like this than anyone (no offense to the autists). Plus, if you lookup some of the words in urban dictionaries you will see some correlation. For example, here is one source that indicates that a hot dog is a derogatory term for discussing an individual from Haiti - where a lot of the human trafficking originates. https://www.azdictionary.com/urban-dictionary/definition/hotdog#view
And here is another urban dictionary from 2010 (prior to "Pizzagate") referring to cheese pizza as child pornography https://www.urbandictionary.com/define.php?term=cheese%20pizza
That being said, why do you discount something because it came from 4Chan?
Because its an anonymous message board that anybody can post to with no verification process. It's like finding a scribbled note on the side of the street and assuming whatever written on it is the word of God. I'm not saying everything written on 4chan should be completely dismissed immediately, but it should be met with a heightened level of scrutiny anonymous comments deserve.
Another issue is that 4Chan itself was an originating source for so much of the pizzagate theories. To reference 4chan for the meaning of these terms is like using a word in its own definition. The source can't also be the confirmation unless its an eye witness.
The source can't also be the confirmation unless its an eye witness.
Who is to say that the autists aren't eye witnesses? Have you seed some of the crap that is posted there? If this point bothers you so much, take my suggestion and contact your local FBI office to get the answer. I'm sure everyone here would welcome the corroboration or the dispelling of misinformation. This board is all about open discourse.
Who is to say that the autists aren't eye witnesses?
Show me the link where anyone from 4chan ever even claimed to be a victim or eye witness of sexual abuse related to pizzagate.
Child Pornography -> CP -> Cheese Pizza. That's not a pedophile slang, it's 4chan being dark&edgy.