Sentence:  He stormed down the path, practically kicking the front gate off its hinges only to see his bus coming, started running desperately and almost got to the stop, desperate fingers outstretched, but the doors slammed shut in his face and the bloody thing drove off leaving him holding onto a lamppost to support himself, gasping, desperate for breath and fit to be tied, the poor bugger watched the bus disappear down the road through a red mist, seething <WSD>fit to kill</WSD>. 
Meaning of the word marked with <WSD> tags:  In a manner full of anger or malevolence.