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2.
A contemporary past-time where participants force the chin and neck into contorted positions, with the ultimate goal of creating as many extra chins as possible. 'Chinningers' (as practitioners of this hobby are known) will then often take photographic images of 'chinnings' in order to post publicly on the internet, using social media platforms such as facebook or twitter.
Dave: "Tell you what Steve, the muscles round the back of my head and neck smart somewhat."

Steve: "Why's that Dave? Sleep funny did you?"

Dave: "Hell no Steve, I was up all night chinning again! Don't really bother with sleep much since I discovered chinning. Might need a couple of rest days now though, think I may need to review my warm-up routine; can't be doing with missing out big chunks of the chinning season through injury again."
by goodoldjimgold July 12, 2012
 
1.
A game, originating in the Midwestern region of the United States, in which participants attempt to photograph one another with their chin on or near the shoulder of an unsuspecting bystander. The quality of a chin is based on proximity to and uniqueness of the person being chinned.
Sally was chinning everyone at the concert last night. She even managed to chin the drummer - wait until you see the album!
by @duhchinning September 20, 2011
 
3.
When a tall boy hugs a girl and rests his chin on the top of her head.
Bill: Dude, Cole is totally chinning Kristin right now.
by Kristin Thompson May 30, 2012
 
4.
The act of rubbing ones chin scruff on any area of a woman's body.
Ashley hates it when I don't shave for a week, especially because I can never resist the urge to start chinning her cheeks and belly.
by TheChinnerOfOurAge November 20, 2011
 
5.
Heavyset person who thinks they look really good in profile pictures, but has more chins than a chinese phone book.....
Sprfxbellasparkles profile pic looks more like "chinning" than "winning"......

chin, jaw, jawbone, double chin, mandible,
by bragging rights September 26, 2011
 
6.
The act of sliding ones chin into a females vagina during oral sex
I was munching on this girls clit last night when she got into it and arched her back and my chin slid right in and she liked chinning.
by Chin Man1234 December 07, 2009
 
7.
(Verb) To start a pointless conversation with no end in sight.
I ran into Bob at the water cooler who started chinning me about his cross pollinating plants.
by Marti Cohen January 14, 2009