"fireballs" in the noun sense
1. bolide, fireball
an especially luminous meteor (sometimes exploding)
2. powerhouse, human dynamo, ball of fire, fireball
a highly energetic and indefatigable person
a ball of fire (such as the sun or a ball-shaped discharge of lightning)
the luminous center of a nuclear explosion
Source: WordNet® (An amazing lexical database of English)
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