I know I've seen one somewhere around, but can't remember the name. Help?

I don't recall there being one, and I've also searched on SubetaLodge, and can't find a cow costume. Perhaps you're mixing it up with the Panda Costume?

Unless you mean items with a cow in it? Like or . There is also a dress:

There's also which does scream a Blackadder cosplay.

Thanks much :) I think it might have been a ToT curse?

Thanks much...and you might be on to something ;)