slam-bang

Adverb
  1. In a careless or reckless manner (synset 400459843)
    "the shelves were put up slapdash"
  2. With heedless speed (synset 400459726)
    "yachts ran slap-bang into the convoy at 15 knots an hour"
  3. In a violent or sudden or noisy manner (synset 400459586)
    "the pans fell slam-bang and woke the whole house"
Adjective
  1. Violent and sudden and noisy (synset 302522852)
    "a slam-bang collision"

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