A ne'er-do-well; an individual who is no good.(noun)
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Use "nogoodnik" in a sentence
"And: 4. Rest assured that anyone who tells you that you need any of the following things on your website is a nogoodnik and/or simply wrong."
"And where was my tape with that heavyweight whose name I am still afraid to mention, given that my meeting with him was part of an investigative mission to get the goods on a nogoodnik agent in the boxing business?"
"If I was a nogoodnik I could abuse their credit card."