Sentence:  I had no idea that anything in the shape of a horse could be so limp as that, either living or dead. His wild mane hung down <WSD>lumpily</WSD>, a mere mass of inanimate horsehair; his aggressive ears had collapsed, but as he went swaying slowly across the front of the bridge I noticed an astute gleam in his dreamy, half-closed eye. 
Meaning of the word marked with <WSD> tags:  In a lumpy manner, with lumps.