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Have any context for this, like what this had to do with the trope?
As in, was this focused on the idea of this being a standard term on ebay, or on the idea of generalizing teddy bear to any stuffed animal being a teddy, etc.
Yes
"Leave us alone, you bastard."
If something like this occurred in a work, I'd have a few ideas.
I know there's There Is No Such Thing as Notability around here, but I wonder if, assuming this did exist, it was deleted. eBay isn't a work, and an example about a couple sellers in need of a dictionary sounds more like an advertisement for the stuffed animals they're trying to unload.
Call me cynical if you wish.
I remember being on a trope page (i forgor what's the name of it) and i found an information about ebay sellers calling stuffed toys "teddies". What trope had the info?