I'm trying to come up with gender-neutral / androgynous forms of idiomatic phrases like "son of a gun", "son of a bitch", etc., substituting the "son" in each case for a neutral word that does not specify the gender of the person in question.
Alternatives I have considered: child, spawn, kid, offspring
None of them sound natural. Haven't been able to find much on this either on this site or the wider Internet, in the latter case possibly because there is simply so much noise from usage.