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Use "rattlebrain" in a sentence
"And as for your prisoner, it's a wonder you weren't both killed, you rattlebrain!"
"Jumping up and down in excitement, his pouches bouncing around wildly, Tas turned without answering and dashed off, leaving the dwarf fuming on the stairs, calling out, "Who's here, you rattlebrain?""
""Nowjust a minute, you old rattlebrain, I never killed no one but the dragon!""