ratty

We got an old tin lantern, and a butcher knife without any handle, and a bran-new Barlow knife worth two bits in any store, and a lot of tallow candles, and a tin candlestick, and a gourd, and a tin cup, and a ratty old bed-quilt off the bed, […] and just as we were leaving I found a tolerable good curry-comb, and Jim he found a ratty old fiddle-bow, and a wooden leg.

He got bad, he got ratty, he would take it out on people around him. He was mean when it turned against him.