slam-bang

from WordNet (r) 3.0 (2006)

slam-bang
    adv 1: in a careless or reckless manner; "the shelves were put
           up slapdash" [syn: {slapdash}, {slam-bang}]
    2: with heedless speed; "yachts ran slap-bang into the convoy at
       15 knots an hour"
    3: in a violent or sudden or noisy manner; "the pans fell slam-
       bang and woke the whole house" [syn: {slam-bang}, {slap-
       bang}]
    adj 1: violent and sudden and noisy; "a slam-bang collision"

from The Collaborative International Dictionary of English v.0.48

Slam-bang \Slam"-bang`\, adv.
   With great violence; with a slamming or banging noise.
   [Colloq.]
   [1913 Webster] Slamkin