lacrimose
A person who cries so hard they might as well be a waterfall with a leaky pipe.
My uncle is a lacrimose. He cried at the dog movie and I cried because I felt bad.
My neighbor is a lacrimose. She cried during the whole concert and I cried because I felt bad.
My cousin is a lacrimose. He cried at the end of the movie and I cried because I felt bad.