Did Bobby start the slang word craze?

[nerrad]

As much as I watched the BB over the years, yesterday was the first time I'd caught on to what Bobby had said. It was the clubhouses episode when the girls were trying to build their own clubhouse. As the fellas and Alice were watching from the window, right after Peter commented on how silly they looked building it, Bobby said something to effect of, "they're lunchin". We used to say that word back growing up. However, it was the first time I heard Bobby say it. Check it out.