Other forms: fireballs
A fireball is a bright ball of flame, or a person of great energy. A rolling fireball, the fireball rose, a little fireball.
In astronomy it has a precise meaning: a meteor brighter than any planet, bright enough to be seen in daylight, and hundreds are recorded every year. Calling a person a fireball is affectionate and means restlessly energetic.
1nounfireballA bright ball of flame, or a person of great energy.
“The fuel tank exploded, and a huge fireball rose into the sky.”
fireball is a flame, or a person.
Fire plus ball. The astronomical sense was fixed by convention in the twentieth century.
The noun is derived from fire + ball. The adjective and verb are derived from the noun.
Etymology from Wiktionary, CC BY-SA