A goatee is
just hair on the CHIN.
The Big Bang Theory Season 7, Episode 16
...with half his CHIN scraped off?
The Big Bang Theory Season 3, Episode 10
and a perfunctory
CHIN jut of recognition
The Big Bang Theory Season 5, Episode 15
Pull the string back to
the center of your CHIN and release.
Game of Thrones Season 3, Episode 6
I expect you to wipe the pudding
off your CHIN. Gentlemen.
The Big Bang Theory Season 6, Episode 8