Adjective
(literally) Completely rotten.
(figuratively) (of a person) Extremely evil; without sound morals.
Source: en.wiktionary.orgOnly crime and the criminal, it is true, confront us with the perplexity of radical evil; but only the hypocrite is really rotten to the core. Hannah Arendt
Mob law is the most forcible expression of an abnormal public opinion; it shows that society is rotten to the core. Timothy Thomas Fortune
It's a good thing that beauty is only skin deep, or I'd be rotten to the core. Phyllis Diller
They're literally terrible human beings. I've read their newsletter, I've visited their website, and they're just rotten to the core. For an organization that prides itself on Christian values - I mean, I'm an atheist, so what do I know? Seth MacFarlane
“The system is rotten to the core … You either vote for Satan or the devil and you catch hell with either one,” said Min. Farrakhan. Source: Internet
This month, the department has gone through three chiefs in nine days before reverting to civilian control as a result of a growing series of horrific revelations and allegations indicating that the department is rotten to the core. Source: Internet