#1 slam-bang s. violent and sudden and noisy; "a slam-bang collision". wn
#2 slam-bang r. [slapdash] in a careless or reckless manner; "the shelves were put up slapdash". wn
#3 slam-bang r. with heedless speed; "yachts ran slap-bang into the convoy at 15 knots an hour". wn
#4 slam-bang r. [slap-bang] in a violent or sudden or noisy manner; "the pans fell slam-bang and woke the whole house". wn
vizzz