break out in a cold sweat
US /breɪk aʊt ɪn ə koʊld swet/
UK /breɪk aʊt ɪn ə koʊld swet/

1.
冷や汗をかく, 冷や汗が出る
to suddenly start sweating a lot because you are very frightened or anxious
:
•
I always break out in a cold sweat when I have to speak in public.
人前で話すときはいつも冷や汗をかく。
•
The thought of the exam made him break out in a cold sweat.
試験のことを考えると、彼は冷や汗をかいた。