The song "Mental Revenge" by Barbara Mandrell is about the singer expressing her anger and frustration towards a former lover who has moved on with someone else. She hopes that the new person her ex is with faces hardships and misfortunes, and that they experience the pain and heartbreak she has felt. The lyrics express a sense of bitterness and a desire for revenge, although the revenge is more about hoping the new relationship fails rather than taking direct action. The song uses country music elements such as fiddle to convey the emotional depth of the singer's feelings. Overall, it's a classic country song about heartache and longing for justice.