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Dwight: Prison Mike, what's the very very worst thing about prison?
Angela: (under her breath) Don't encourage him, don't...
Michael: The worst thing about prison was the... was the dementors! They were flying all over the place and they were scary and then they'd come down and they suck the soul out of your body! And it hurt!
Karen: Dementors... like in Harry Potter?
Michael: No... Not Harry Potter.
dementor by emmawemawoo October 20, 2008
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They guard the prison of Azkaban. They suck all the happiness out of people and you'll feel like you'd never be happy again when a dementor comes near you.
"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. Even Muggles feel their presence, though they can't see them. Get too near a dementor and every good feeling, every happy memory will be sucked out of you. If it can, the dementor will feed on you long enough to reduce you to something like itself...soul-less and evil. You will be left with nothing but the worst experiences of your life."
dementor by Nastansja March 18, 2004
A girl who gives really good head, but her very annoying personality slowly sucks away your soul.
Bro 1: Bro, Jasmine gives crazy head. Matty is so lucky.
Bro 2: No way bro, she's a dementor,

Bro 1: What does that mean?
Bro 2: It means she's fucking crazy.
Bro 1: Oh, that would it explain why Matty never wants to hang with us anymore.
Dementor by Titus Blowhard September 2, 2010
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...
dementor by Real World HP March 1, 2010
Someone who is in the fringe of your group of friends who is tolerated because it would be a shame to tell them to Fuck off!
They also have some strange ability to turn even the funniest momements into akward ones and sap all happiness from those around.
Person 1 : Never invite jim to out for a drink

Person 2 : Why not

Person 1 : Cuz he's a fucking Dementor
Dementor by derek m is gay February 26, 2009
Dude one: bro are you ok your acting like a dementor

Dude two: yeah I'm fine just stressed from quarantine
Dementor by Beansboii April 15, 2020
1. A really really hot chick. She's so hot she's scary. It can also be a really really hot guy, but it mostly for women. This dementor makes something silvery come out of your wand.
You must be a dementor , because when I see you, something silvery comes out of my wand. I mean seriously, expecto patr-OH!!!
dementor by Filius Flitwick February 1, 2007