A goatee is
just hair on the CHIN.
The Big Bang Theory Season 7, Episode 16
Benjen always lifts his CHIN
when he's about to charge.
Game of Thrones Season 6, Episode 2
and a perfunctory
CHIN jut of recognition
The Big Bang Theory Season 5, Episode 15
I expect you to wipe the pudding
off your CHIN. Gentlemen.
The Big Bang Theory Season 6, Episode 8
...with half his CHIN scraped off?
The Big Bang Theory Season 3, Episode 10