Savannah Chrisley's ex-fiancé, Nic Kerdiles, had alcohol in his system when he died earlier this year after a fatal motorcycle crash ... this according to the medical examiner.
According to the autopsy report, obtained by TMZ, the ME in Nashville found evidence of ethanol in Kerdiles' bloodstream after toxicology tests were done ... and they estimate his BAC at about 0.124, well over the legal limit.
Officials note Kerdiles' body was pretty banged up as a result of the accident -- including multiple broken bones, bruising of the brain and other abrasions.