machacho
a person who will go on and on about nothing, but somehow you still laugh at them because they're just so dumb
My mom is the worst machacho. She talks about her day for an hour and still expects me to listen.
My friend is a machacho. He told the same joke three times and I still laughed.
My neighbor is a machacho. He yells at the cat and then acts like it's a big deal.