lip
bite your lip repress an emotion; stifle laughter or a retort.
button your lip: seebutton.
curl your lip raise a corner of your upper lip to show contempt; sneer.
hang on someone's lips listen attentively to someone.
lick (or smack) your lips: seelick.
pass someone's lips be eaten, drunk, or spoken by someone.
pay lip service to something express approval of or support for something without taking any significant action.
2005New York Times The truth is that for all the lip service paid to supporting the troops, out of sight is often out of mind.
read my lips: seeread.
someone's lips are sealed a person is obliged to keep a secret.
a stiff upper lip: seestiff.