Son of a Biscuit Eater (1877); Soup Strainer (1907)

[George Thompson]

BADGERING THE PRESIDENT.
Los Angeles Times (1886-Current File). Los Angeles, Calif.: Nov 17, 1914. p. II4 (1 page):
   ...that they had equal rights with McAdoo or Burleson; that those rights should be respected, and that Mr. Wilson was a son of a biscuit, or words to that effect.

This seems to me to be a different phrase from "son of a biscuit-eater" meaning "illegitimate son of a sea-biscuit eating sailor".  This and the others that are just "son of a biscuit" sound more like a euphemism for "son of a bitch".  A sound-alike euphemism that is intended to call the improper phrase to mind, like W. C. Fields' "Godfrey Daniels".

GAT

George A. Thompson
Author of A Documentary History of "The African Theatre", Northwestern Univ. Pr., 1998.