"l pressed" means: The specific flavor of being bothered that comes from having already taken an L — losing something and then being visibly, continuously agit.... This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.