上头
shàngtóu
Literally says
goes straight to the head
Actually means
to get hooked or irrationally obsessed, like a buzz
When to say it
Originally the feeling of alcohol hitting your head, now for anything addictive. A drama you binge until 3am, a game you cannot quit, a crush you cannot stop thinking about. Say it when something has completely taken over your brain.
Hear it in the wild
这剧太上头了，看到凌晨。
Zhè jù tài shàngtóu le, kàndào língchén.
This show is so addictive, I watched until dawn.
这首歌听一遍就上头。
Zhè shǒu gē tīng yí biàn jiù shàngtóu.
One listen and this song is stuck in my head.