a chin that has a small/large dent in the center.
Look at "Jessica Simpson", she has a butt chin.
And so does her dumb sister.
A cleft chin, normally shaped in a way resembling a human butt
My red headed friend has a huge buttchin
a dimple on the chin, just as envied as cute dimples on the cheeks a term often used to connote jealousy of the beauty of the person who has the dimple
A beauty mark
Person 1: she has a butt chin
Person 2: Whoa jealous much? It's a cute addition to her already beautiful face!
A chin with a large (or even noticeable) cleft.
Why did that guy get chin implants? Now he has a buttchin.
A second ass on the face
I want to fuck your buttchin
A person with an indent in the middle of their chin, resembling the characteristics of a butt.
Woah that dudes got a mad butt chin. I wish I had a butt chin so I could blow my nose and wipe my ass at the same damn time.