Definition of slam-bang
1 : unduly loud or violent
a slam-bang clatter
2 : having fast-paced often nonstop action
a slam-bang adventure novel
3 : vigorously enthusiastic
made a slam-bang effort to win
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Merriam-Webster unabridgedWords at Play
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Time Traveler for slam-bang
The first known use of slam-bang was circa 1823
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