'ball of fire' definitions:

Definition of 'ball of fire'

(from WordNet)
noun
A highly energetic and indefatigable person [syn: powerhouse, human dynamo, ball of fire, fireball]
noun
Someone whose career progresses rapidly [syn: go-getter, whizz-kid, whiz-kid, ball of fire]

Synonyms of 'ball of fire'

From: Moby Thesaurus