brain freeze
noun [ C or U ] uk/ˈbreɪn ˌfriːz/ us/ˈbreɪn ˌfriːz/
(also ice cream headache)脑冻结，脑急冻（人在很冷的地方或者吃了冷东西后，有时会在头前部或侧面感到的一种剧烈疼痛）
a sharp pain in the front or at the side of the head that people sometimes feel when they are somewhere very cold or when they have eaten something cold
脑子坏了，脑子短路
an occasion when someone cannot think clearly, or cannot remember something
She suffered an embarrassing brain freeze in the interview and just could not remember the relevant figures. 面试时她大脑僵住了，就是想不起相关数字，非常尴尬。