In vino veritas (in VEE-noh VER-ee-tahs; V's in Latin were pronounced like an English W) is a Latin phrase that literally translates to English as "In wine truth." Due to Latin's dependancy on context, though, translations with probably similar meanings are "In wine there is truth" or "Truth in wine", implying that drinking makes one more truthful. Over time, it has been cheered at various gatherings where alcohol is present to encourage others to make drunken, and potentially embarrassing, speeches.
It is uttered by Doc Holliday (played by Val Kilmer) to Johnny Ringo (played by Michael Biehn) in the movie Tombstone.
It is the title of a weekly wine column by Jonathon Alsop that has been in publication for upwards of 15 years.