The hearteater is like the grim reaper. Instead of comng for your soul, it comes for your (emotional) heart. It usually works with the grim reaper to get the emotions from dead or drying people. But often, it will come from those who expect it the least. The hearteater will swap your heart with "poison" That poison can make you feel suicidal, anxious or depressed.
A cold hearted bitch is a person who has gone through a lot of stuff, a person who seemed to care about others too much and received nothing but disrespect and bad shit in exchange. By that the person switched up, he/she stopped caring about anything they kept everything to them selves and showed no type of emotions
"She's been treated like shit so many times, she became a cold hearted bitch"
A term used to define whiney or unnecissarily sad people. One tends to become pee-pee hearted when 1)They do not get their way, 2)when they are in a bad mood, and 3)They are weepy.