Sentence:  He sprang on his prey with a pounce, / And he gave it a jerk and a <WSD>trounce</WSD>; / Then crunched up its bones / On the grass or the stones, / This carnivoristicous Ounce, / 'Ticous Ounce! / This carnivoristicous Ounce! 
Meaning of the word marked with <WSD> tags:  An act of trouncing: a severe beating, a thrashing; a thorough defeat.