Definitions by Nosperato

Dementor's Kiss 

The act of sucking the air out of your partner's lungs during a make-out session.

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

Dementor's Kiss by Nosperato January 15, 2012