“本来挺喜欢他的，看到他跟服务员发脾气，瞬间下头。”“下头”是？
“I liked him until he yelled at the waiter — instant 下头.” Meaning?
全球翻车率（内测预估）
A低下了头
dī xià le tóu · lowered his head
✓好感瞬间消失，扫兴
hǎo gǎn shùn jiān xiāo shī，sǎo xìng · the attraction vanishes instantly, a real turn-off
C下楼了
xià lóu le · went downstairs
D点头同意
diǎn tóu tóng yì · nod in agreement
上头三个月，下头三秒钟。对服务员的态度，是最快的照妖镜。
下头 = the mood/attraction instantly dying; a buzzkill. The antonym of 上头 (getting hooked).