To make a miscalculation or reckless move that leads to a worse situation. A single wrong step can undo everything built with effort, and its consequences are often harder to repair than the original problem ever was.

To have protection, support, or backup in case something goes wrong. Someone with a safety net is less concerned about unexpected events.

To have a secret resource or hidden advantage ready to use at the most convenient moment. The person with an ace up their sleeve never shows all their cards at once and always surprises when others thought they had already lost.

To completely let go and relax, losing one's inhibitions and enjoying oneself without worrying about what others think.