zip one's lip
To refrain from or to stop talking; to be quiet; shut up.
Why don’t you just zip your lip? I’m tired of listening to you.
ADJ
top, upper | bottom, lower | chapped, cracked, dry | moist | fleshy, thick | thin | firm
VERB + LIP
bite, chew
She chewed her lip while waiting for the test results to come back.
press together, purse
He pressed his lips together nervously before speaking to the interviewer.
pout
lick, smack
She smacked her lips after tasting the delicious chocolate cake.
moisten
She moistened her lips before speaking to the large audience.
LIP + VERB
move, part
When he spoke about his childhood, his lips moved slightly as if he was still feeling the emotion.
quiver, tremble
curl
When she heard the joke, her lips curled into a wide smile.
pout
Her lips pouted slightly when she didn't get the toy she wanted.
protrude
PREP
around/round your ~
She bit her lip nervously while waiting for the test results.
between your ~
She held the straw between her lips and took a long sip of the smoothie.
on your ~
He had a nervous smile on his lips when he entered the interview room.