• babykiller,baby killer

The Vietnam War veteran usage stems from theMy Lai massacre (1968), in which hundreds of civilians, including infants, were massacred.

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baby-killer (pluralbaby-killers)

1. (slang,derogatory) Anabortionist(all senses).
   • 1999,Charisma and Christian Life, volume24, numbers6-11, page38:

     He promised to protect and serve "even ababy killer like yourself," but also to do everything in his office's power "to assist the protesters who wish to protect the misguided mothers who come to your clinic of death."

2. (slang,derogatory) Apregnantwoman who receives anabortion.
3. (slang,derogatory,dated) AVietnam War veteran.
4. (slang,derogatory) Amember orveteran of theUS military.
5. Used other than figuratively or idiomatically:seebaby,‎killer.
   • 1911,Michigan's Health, volumes6-7, page90:

     The following named soothing-syrups commonly given to children during their teething period have been proclaimed by the United States government chemists as “baby killers;” and the public is hereby warned against the use of any of these preparations for children[…]