Noun
Used other than figuratively or idiomatically: see piece, of, garbage.
(derogatory) A bad person or thing; an object of poor quality.
Source: en.wiktionary.orgI object to being called a chess genius because I consider myself to be an all around genius who just happens to play chess, which is rather different. A piece of garbage like Kasparov might be called a chess genius, but he's like an idiot savant. Outside of chess he knows nothing. Bobby Fischer
Nor do I think we came from monkeys, by the way...That's another piece of garbage. John Lennon
Beauty is in the strangest places. A piece of garbage floating in the wind. And that beauty exists in America. It exists everywhere. You have to develop an eye for it and be able to see it. Alan Ball