clam up
US /klæm ʌp/
UK /klæm ʌp/
1.
diam seribu bahasa, bungkam
to suddenly stop talking, especially when you are expected to speak
:
•
When the police started asking questions, he just clammed up.
Ketika polisi mulai bertanya, dia langsung diam seribu bahasa.
•
She tends to clam up when she's nervous.
Dia cenderung diam ketika dia gugup.