rotten to the core

Adjective

 * 1)  Completely rotten.
 * 2)  Corrupt; evil; immoral.
 * 3) * 1978,, "", , 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.