| a dynamic person capable of or displaying rapid and highly effective thought, action, etc.: The new manager turned out to be a ball of fire. |

| ball of fire n. pl. balls of fire A highly energetic or dynamic person. Also called fireball. |
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ball of fire
and fireball
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ball of fire
A dynamic, energetic, and successful individual, as in I hope Pat joins us; she's a real ball of fire. [Slang; early 1800s]