Have you received a message containing “ISG” and wondered what those three letters actually mean? In casual texting, ISG most commonly means “I Swear to God.” People use it to emphasize that they are being honest, serious, frustrated, surprised, or very emotional. However, there is an important detail: ISG is less standardized than ISTG, the … Continue reading What Does ISG Mean in Text? The Real Slang Meaning Explained