Definition: A reflexive, often habitual behavior, especially one occurring in a context that often features attempts at deception by persons under psychological stress (such as a poker game or police interrogation), that reveals information that the person exhibiting the behavior is attempting to withhold.

Alright class, settle down, let’s talk about “tells.” Now, this word can be tricky, it's more than just fidgeting, you see. The dictionary gives us a really good explanation, so listen close and pay attention with glee! It says "tells" are behaviors – habits, quite true – that people do when they’re trying to hide something from view. Think of it like this: They're telling you, without actually saying “yes” or “no,” about what they're really feeling, or what they’re truly going to bestow. It’s often a reflex, something done without thought, especially when pressure is building, and secrets are caught! Like in a poker game, with chips stacked high, a nervous twitch can betray a winning eye. Or during an interrogation, feeling the heat so strong, a subtle shift in posture might prove where they don't belong. So "tells" aren’t just random movements, it’s about revealing what’s concealed, a sign that someone’s carefully revealed – Though they’re trying to keep it hidden, the truth is now revealed! Key takeaways: Reflexive & Habitual: It's often an unconscious action. Deception: It happens when someone wants to hide something. Psychological Stress: The pressure makes these behaviors more pronounced. Revealing Information: Ultimately, the “tell” gives away what they’re trying to conceal. Do you have any questions about this? Let's discuss!