A person who sucks up behaviors, speech, or styles that they think are cool or funny from those around him/her or in the media and adopts them as his/her own personality like a dementor eating someone's soul. This person is trying to be accepted, but most likely comes off as a douchebag, try hard, piece of shit.
Greg: "Did that dude just say your line, bro?"
Mike: "Yeah, he steals everything I do."
Greg: "Fucking social dementor."
Mike: "Yeah, he steals everything I do."
Greg: "Fucking social dementor."
by the G-Bear March 02, 2014

Jaime: Yeah Ben and I were smoking and we did some Dementor's Kisses.
Laura: Wow you must have been baked!
Laura: Wow you must have been baked!
by spookymulder September 01, 2013

During a make-out session with my boyfriend, I (quite sweetly) uttered the line “you take my breath away”. He leaned in to kiss me again, and as we were doing so he literally sucked the air out of my lungs before exclaiming “That’s what it feels like to be a Dementor!”
The worst thing…his geekiness actually turned me on a bit.
~ A Prisoner of Azkaban, College Humor, after experiencing a Dementor's Kiss
The worst thing…his geekiness actually turned me on a bit.
~ A Prisoner of Azkaban, College Humor, after experiencing a Dementor's Kiss
by Nosperato January 15, 2012

by peachcrusts April 20, 2018

The person who sucks the life force out of every one else involved by constantly repeating information or discussing a topic ad naseum. After being in contact with a Conference call dementor most people wish for death...
As a conference call dementor, Carol went on about the pie graph for an hour, before Phillip ran screaming from the room
by office minion August 07, 2012

An extreme case of Social Dementorism in which the loser sucks up another person's entire lifestyle, from wardrobe to basic personality traits
Greg: "Whoa, that kid completely stole every aspect of your being!"
Mike: "I know! He performed the dreaded Social Dementor's Kiss."
Greg: "Yeah either that, or he wants to fuck you real bad."
Mike: "True... True."
Mike: "I know! He performed the dreaded Social Dementor's Kiss."
Greg: "Yeah either that, or he wants to fuck you real bad."
Mike: "True... True."
by the G-Bear March 02, 2014

derived from Potter Puppet Pals, this is one of the grave "wizard swears"...it joins the large category of insults which question a guy's manhood
by bookworm3x4 August 24, 2009
