Someone who is overly talkative while performing oral sex, usually to the point where he or she who is experiencing the oral sex is unable to get any pleasure from the act.
Chatterchomping excludes such phrases as, "ooh baby", "oh yes", "cum for me", "I want to taste you", etc., as these phrases commonly contribute to the enjoyment of both parties.
One way to combat chatterchomping is to say to your partner, "Shut that mouth before I have to put a dick in it."
Candace said to her friend, "Oh my god, you know Kenny? He's a nice guy, but what a chatterchomp! He was eating me out and he just would NOT stop talking about the Homerun Derby! What a downer."