Mid 16th century; earliest use found in Christopher Goodman (d. 1603), Church of England clergyman and radical protestant thinker. From idiot adjective + born.
Definition of idiot born in US English:
idiot born
nounˌɪdɪət ˈbɔːn
Regional archaic, offensive
A person mentally disabled from birth.
Origin
Mid 16th century; earliest use found in Christopher Goodman (d. 1603), Church of England clergyman and radical protestant thinker. From idiot [adjective] + born.