son of a gun

Euphemistic variant of son of a bitch. Folk etymologies suggesting nautical origins are not supported by evidence.

son of a gun (plural sons of guns)

1. (euphemistic) son of a bitch

   That son of a gun stole my wallet!

   • 1690, anonymous, Teagueland Jeſts, or Bogg-Witticisms, part 2, page 138:

     A plaugue tauke dee, dou damn’d Shon of a Gun, de Deevil carry dee away alive for me; […]

   • 1726, The British Apollo‎, volume 2, third edition, [London]: Theodore Sanders, page 379:

     You Apollo's son, You're a son of a gun

   • 1848 November – 1850 December, William Makepeace Thackeray, chapter 61, in The History of Pendennis. […], volume (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850, OCLC 2057953:

     Why, I say, old feller, what a happy feller I once thought you, and what a miserable son of a gun you really are!

   • 1886 October – 1887 January, H[enry] Rider Haggard, She: A History of Adventure, London: Longmans, Green, and Co., published 1887, OCLC 1167497017:

     "Why, Job, you old son of a gun, where the deuce have we got to now - eh?"

2. Used encouragingly or to compliment

   You son of a gun, you did it!

son of a gun

1. (euphemistic) Used to express anger, contempt, disgust, astonishment, disappointment, etc.

   Son of a gun! I just got stung by a wasp!

• son of a gun on Wikipedia.Wikipedia