Green’s Dictionary of Slang

a piece of excrement.

1960		J. Franklyn Dict. of Rhy. Sl. 98/2: My word Turd [...] generally used jocularly in ref. to dogs fouling the footway: ‘My word, I trod on my word’.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1992		R. Puxley Cockney Rabbit.