кусок дерьма

Etymology
Probably (borrowed at the end of the 20th century after the dissolution of the Soviet Union, with the rising influence of American popular culture in Russia), to denote the same idea that  is traditionally used for, but usually only literally (never of a thing or person).

The calque nature of the idiom is obvious to a native speaker since presupposes  in Russian. For example,. While the English idiom piece is used in the sense of an item belonging to the class of similar items, the meaning of Russian is closer to that of the English word part.

Since the source of the calque is transparent, the synonymous combination is possible as well, but the usage of both phrases is restricted even in colloquial speech.

Noun

 * 1)  piece of shit (a bad thing or person)