Using someone's mouth insted of your hand to get off. Ignoring or not caring about anything but your own pleasure. See also blowjob.
I got my girlfriend mouthturbate me while I watched this new porno I rented. Hands free jacking off.
When one speaks out loud but the content of what is being said is either innacurate, irritating, or does not pertain to anyone who is listening.
I decided not to attend the Tea Party rally because the thought of listening to Sarah Palin mouthturbate for an hour was just too unpleasant.