'Low-effort' describes something done with minimal care or thought — a low-effort meme, a low-effort outfit, a low-effort text reply. It is a standard piece of internet vocabulary used by anyone who spends time online. Among teens it can be a putdown ('this homework is low-effort' = poor quality) or a friendly self-description ('low-effort dinner' = a quick easy meal). Mostly neutral and descriptive, occasionally critical. No coded or hidden meaning. Often used as the opposite of 'high-effort', which means thoughtful and elaborate.