jabber jockey
A mouthy waste of air who won't stop talking and won't let anyone else speak. Or a loud radio host who thinks music is just a fancy way to take a break from his own voice.
My cousin is a jabber jockey. He talks during the entire movie and then yells at the characters for being stupid.
My uncle is a jabber jockey. He talks during the entire football game and yells at the players for making mistakes.
My friend is a jabber jockey. He talks during the entire dinner and yells at the food for not tasting good enough.