slam-bang

adjective

1
in a violent or sudden or noisy manner
the pans fell slam-bang and woke the whole house
2
with heedless speed
yachts ran slap-bang into the convoy at 15 knots an hour
3
in a careless or reckless manner
the shelves were put up slapdash

Also useful for “slam-bang”:Crossword— Multi-word entries show up in clues