slam-bang

Adjective

• violent and sudden and noisy
  • a slam-bang collision
    

Adverb

• in a violent or sudden or noisy manner
  • the pans fell slam-bang and woke the whole house
    

• with heedless speed
  • yachts ran slap-bang into the convoy at 15 knots an hour
    

• in a careless or reckless manner
  • the shelves were put up slapdash
    

Related words

• Synonyms: 
  slap-bang , slapdash