to  button one's  lip
<abbr style="text-decoration: underline;" title="button / zip" > button</abbr>
bʌtn
batn
<i>one's</i>
zɪp
zip
lip
wʌnz
vanz

英語での「 button one's lip 」の定義と意味

to button one's lip
01

to not say anything or immediately stop talking, particularly so as not to reveal a secret or make matters worse 

Dialectamerican flagAmerican
to [button|zip] {one's} [lip] definition and meaning
慣用句
Zip your lip before you make things worse. 
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