Bobby Singer (to doctor): If they were DOA, you have an ETA on TOD? Any sample DFA? …DNA?
(after the doctor leaves)
Sam Winchester: D-F-A?
Bobby Singer: I’ve been fighting a friggin’ apocalypse for 15 years. My FBI might be a little rusty.
From Supernatural – Season 14 Episode 2: ‘Gods and Monsters’ (14×02)