One who engages in the sexual practice of cunnilingus. Pussy eating. Often pertaining to lesbians, but can also pertain to men as well.
How little did I know that the hot chick sitting at the bar was in fact a tuna taster.
by dumb ironworker January 18, 2007
A person who engages in oral sex with a middle aged woman.
Francis has become such a Tuna Taster.
by Web Willy April 07, 2003