Trash, garbage, or something of poor quality; junk or worthless material.
From Yiddish 'drek', ultimately from German/Old High German 'drek' meaning feces or filth. The word entered English in the 20th century via American Yiddish speakers and has become colloquial.
Yiddish gave English tons of colorful insult words—'dreck' is fun because it keeps its literal gross origin while being acceptable to say in casual conversation, unlike its crude German ancestor.
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