1. n. A fictional creature from the Harry Potter series. Dementors guard the wizard prison Azkaban and suck all of the happiness from anything in their presence. Their worst weapon is called the dementor's kiss, which is when a dementor sucks a person's soul out through their mouth.
2. n. A person who kills a good moment or sucks all of the fun out of a situation.
1. "Dementors are among the foulest creatures that walk this earth. They infest the darkest, filthiest places, they glory in decay and despair, they drain peace, hope, and happiness out of the air around them."
2. Robert: Wow I hate going to parties with Erin, she's such a dementor.
Nathan: I know, all she does is stand in the corner and frown...
noun: something that energizes you quickly, such as coffee or an energy drink
Fred: dude, I really need a patronus right now, I feel like I'm about to pass out.
Paul: alright, let's run down to starbucks.