lowlife

adj

1. Lacking morality.
2. Seemingly mischievous and troublesome to society.

noun

1. (derogatory)An untrustworthy, despicable, disreputable, or otherwise immoral person, especially one suspected of being a criminal.

   “They say all the lowlifes used to hang out at the docks and plot their despicable crimes, before being elected to public office.”

2. (derogatory)A person who is rebuked by their community for their behavior.
3. (derogatory)A person of low socio-economic status.