• WordNet 3.6
    • adv slap-bang in a violent or sudden or noisy manner "the pans fell slam-bang and woke the whole house"
    • adv slap-bang directly or immediately "it hit slap-bang in the middle"
    • ***
Century Dictionary and Cyclopedia
    • slap-bang With a slap and a bang; hence, suddenly; violently; with a sudden noisy dash; headlong; all at once: as, to go slap-bang through the ice or through a window. Also slam-bang.
    • slap-bang Violent; dashing. Also slam-bang.
    • n slap-bang A low eating-house.
    • ***
Chambers's Twentieth Century Dictionary
    • adv Slap-bang violently, all at once
    • ***


Chambers's Twentieth Century Dictionary
Allied to Low Ger. slapp, Ger. schlappe; imit.


In literature:

Soon Rose heard sighs and phews, and sudden rustlings and slappings, and then the bang of a book upon the floor.
"Sisters" by Ada Cambridge
Such a child for answering slap bang I never.
"A Terrible Temptation" by Charles Reade
We walked slap-bang into perfectly directed fire.
"A Yankee in the Trenches" by R. Derby Holmes
The mistress fainted slap bang.
"My Neighbors" by Caradoc Evans
There was a quick slap of the latch, a scuffle behind her, and the door came shut with a bang.
"Rimrock Jones" by Dane Coolidge
The dust choked her, and she stumbled, and the sole of one shoe came half off, and slapped, and banged, and delayed her as she walked.
"The Indian's Hand" by Lorimer Stoddard
Yes, I like you right straight away, and I always make up my mind about people, slap bang off at once.
"A harum-scarum schoolgirl" by Angela Brazil
His face should be slapped and his head should be banged; A person like that ought to die!
"Something Else Again" by Franklin P. Adams
A slap-bang supper now, Tamsin, mind that!
"The Birthright" by Joseph Hocking
Slap bang into Potter's Bar, slap bang out of it and round the bend towards Prickly Hill.
"The Man Who Drove the Car" by Max Pemberton

In poetry:

Oh had I the wings of a turtle-dove,
I'd soar on my pinions so high,
Slap bang to the arms of my Polly love,
And in her sweet presence I'd die.
"Botany Bay" by Anonymous Oceania