slam-bang (Adjective) — Violent and sudden and noisy. ex. "a slam-bang collision"
slam-bang (Adverb) — In a careless or reckless manner. ex. "the shelves were put up slam-bang"
slam-bang (Adverb) — With heedless speed.
slam-bang (Adverb) — In a violent, sudden or noisy manner. ex. "the pans fell slam-bang and woke the whole house"