Dictionary definition · slam-bang
adjective
- violent and sudden and noisy"a slam-bang collision"
adverb
- in a careless or reckless manner"the shelves were put up slapdash"
- with heedless speed"yachts ran slap-bang into the convoy at 15 knots an hour"
- in a violent or sudden or noisy manner"the pans fell slam-bang and woke the whole house"
Source: Open English WordNet (CC BY 4.0).