"tearaway" in the noun sense
1. tearaway
a reckless and impetuous person
"tearaway" in the adjective sense
1. hotheaded, impulsive, impetuous, madcap, tearaway, brainish
characterized by undue haste and lack of thought or deliberation (`brainish' is archaic)
"a hotheaded decision"
"liable to such impulsive acts as hugging strangers"
"an impetuous display of spending and gambling"
"madcap escapades"
Source: WordNet® (An amazing lexical database of English)
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