The bottom of a face, (specifically) the typically jutting jawline below the mouth.
The lower part of the front of an aircraft, below the nose.
A person of the upper class.
Talk.
The ability to withstand being punched in the chin without being knocked out.
The bottom part of a mobile phone, below the screen.
A lie, a falsehood.
A chinchilla.
To indicate or point toward (someone or something) with one's chin.
To perform a chin-up (exercise in which one lifts one's own weight while hanging from a bar).
To put one's chin on (something).
To punch or hit (someone)'s chin (part of the body).
To turn on or operate (a device) using one's chin; to select (a particular setting) using one's chin.
To put or hold (a musical instrument) up to one's chin.
The sagging flesh on the throat of an elderly human.
The pendulous skin under the neck of an ox, or a similar feature on any other animal.