Deipnosophist

deipnosophist \dyp-NOS-uh-fist\, noun:
Someone who is skilled in table talk.

At the age of six his future as a deipnosophist seemed certain. Guzzling filched apples he loved to prattle. Hogging the pie he invariably piped up and rattled on.
-- Ellis Sharp, "The Bloating of Nellcock"