There seems to be something new every day. A few days ago we noticed that he's started (rarely) repeating words from our conversations. Last week it was banana ("bamama"), and then "ish" the other night. (Ish means "sort of". I'd call it an idiosyncracy rather than slang.) He's also talking in long, fully inflected babble phrases, though he hasn't quite given up on "bap." Ron says that he heard Peter saying it under his breath again the other day" "bap, bap, bap, bap." "Dat" seems to be outmoded now, though I think I might have heard it make a reappearance tonight.
Something else that isn't really new is that Peter's eating a lot of table food, as opposed to prepared baby food. He's not picky, which surprises me after his initial reaction to green beans. He eats almost everything we do, though not wheat, eggs, dairy, nuts, fish, or shellfish yet. Tonight he had his supper (sweet potatoes, I think, corn, and maybe bananas) and then shared mine: broccoli, tofu, and sweet potato curry over basmati rice (from the tofu section of Joy of Cooking).