according to one 4chan poster it’s:
Cheese Pizza = Child Porn
They should know. A lot of that crap gets posted on there and they have been known to bring down pedos by hacking them.
There's also a claim from someone tagged as "Undertaker" who supposedly has NYPD contacts that say there's "a file labeled 'Intimate' according to this NYPD insider, this file contained x rated photos of Huma and Hillary with a TEENAGER".
He also claims that pics and other content like this are one of the reasons why Weiner was forwarding Huma's emails to his laptop.
Credible? It's 4chan, so who knows. Decide for yourself. Wouldn't surprise me at all though.