Someone is 'chronically online' when they spend so much time on the internet that their worldview, opinions and reference points reflect niche internet discourse rather than real-life experience. Saying someone has a 'chronically online take' means their view only makes sense if you've been deep in social-media subcultures. If your teen calls someone (or themselves) chronically online, it's usually self-aware criticism. Worth a gentle conversation if they describe themselves this way often.