How dare you! To objurgate is to scold or reprimand. Don’t objurgate yourself, or beat yourself up if you didn’t know it — it’s an old word that people don’t use much anymore.
To scold — or to express your disgust and condemnation of — is to objurgate, although this useful word has become quite rare. You're more likely to hear someone use words like castigate or reprimand these days. Objurgate comes directly from the Latin obiurgare, "to chide or rebuke."