rotten to the core

English

Adjective

rotten to the core (not comparable)

1. (literal) Completely rotten.
2. (figurative, of a person, an organization, or a cultural phenomenon) Corrupt; evil; immoral.
   • 1978, Van Halen, "Ain't Talkin' 'bout Love", Van Halen, reported in The Little Black Book of Metal Hits (2006), p. 6:

     Ain't talkin' 'bout love / My love is rotten to the core / Ain't talkin' 'bout love / Just like I told you before.