slam-bang
1. [ adverb ] with heedless speed
Examples:

"yachts ran slap-bang into the convoy at 15 knots an hour"

2. [ adverb ] in a careless or reckless manner
Synonyms: slapdash
Examples:

"the shelves were put up slapdash"

3. [ adjective ] violent and sudden and noisy
Examples:

"a slam-bang collision"

Related terms: cant violent
4. [ adverb ] in a violent or sudden or noisy manner
Synonyms: slap-bang
Examples:

"the pans fell slam-bang and woke the whole house"

Similar spelling:   slumbering
  slumber