totesgoats908234

I know some people may not think so, but I consider urban dictionary a reliable source for slang. I have used it for a decade at least to look up slang meanings.

Pizzatemp420

Cheese/cheese pizza standing for children/child porn has been a thing since before the beginning of the chans.

I remember it being mentioned in the book 'We Are Anonymous' by Parmy Olson dated 2012. So that's pre PG, but I know it's older than that.

Edit: it wouldn't let me link the book from Amazon for some reason.