Jaw : noun Each of the two bony arches of the mouth, in which the teeth are implanted.
To play, to work the jaws: to eat.
Yawn until your jaw is released: yawn strongly.
To make the jaw drop with amazement: to be amazed, to stun someone.
Take one in the jaws: receive a punch in the face.
Old jaw: Person without capacity, ignorant, fool.