deterioration; getting worse; worsening; aggravation; degeneration; corruption
evil spirit; demon; devil
misdeed; wrongdoing; wickedness
rascal; villain; scoundrel; ruffian; crook
ill feeling; ill will; animosity; bad impression
all kinds of malicious gossip; heaping verbal abuse (on); cursing and swearing (words)
ill feeling; ill will; antipathy; animosity
(verbal) abuse; name-calling; abusive language; insulting remarks
sow evil and reap evil; evil acts bring evil outcomes
hard ball to hit; bad pitch
environmental degradation
when there is a legal tender currency, bad money drives out good money (Gresham's Law)
foul-smelling air; noxious gas
suddenly turning for the worse; sudden deterioration