truth serum 

a drug used to lower inhibition in patients with severe anxiety-based phobias or prisoners in order to entice them to tell the truth about any questions asked

sodium amytals; amobarbital, or sodium pentothol

truth serum by Raven Dyer-lang May 11, 2003

Alabama truth serum 

A baseball bat or similar weapon that can be used to 'beat the truth' out of someone.

"How did you find out where he was hiding his money?"

- "I just used some alabama truth serum"

"huh?"

- "I beat the shit outta' him with a baseball bat until he told me where the money was"

Alabama truth serum by gfdubya January 8, 2011