noun (plural sons of guns) Date: 1708 — usually used as a mild or euphemistic alternative to son of a bitch; sometimes used interjectionally to express surprise or disappointment
SON OF A GUN
Meaning of SON OF A GUN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012