When someone attempts to speak whilst gaping, often repeating the few words that can be said with an open mouth ie Coca-Cola, Solo, How ya goin'?
Person 1: What are you doing?
Person 2: (Gape talking) Gaping! Coca-Cola now!
Person 1: (Gape talking) Ahhh shit!
Person 2: (Gape talking) Ahhhh shit!