In vino veritas 

In vino veritas is a Latin phrase that means "in wine there is truth."

The expression, together with its counterpart in Greek, "Ἐν οἴνῳ ἀλήθεια" (En oinōi alētheia), is found in Erasmus' Adagia, I.vii.17. Pliny the Elder's Naturalis historia contains an early allusion to the phrase. The Greek expression is traced back to a poem by Alcaeus.
Herodotus asserts, and it is likely enough, that if the Persians decided something while drunk, they made a rule to reconsider it when sober. Authors from Herodotus onwards, however, have dared to add that if the Persians made a decision while sober, they made a rule to reconsider it when they were drunk (Histories, book 1, section 133).
The Roman historian Tacitus described how the Germanic peoples always drank while holding councils, as they believed nobody could lie effectively when drunk.
The phrase is often continued as, "In vino veritas, in aqua sanitas", i.e., "In wine there is truth, in water there is health."

The phrase is often continued as, "In vino veritas, in aqua sanitas", i.e., "In wine there is truth, in water there is health."

In vino veritas by KImCobain March 3, 2015

in vino veritas 

Literally "truth from wine", getting someone drunk enough to tell the truth

It's a dead language, no one speaks it

in vino veritas by Matt February 12, 2004