What's the meaning of 厨 in internet slang?
厨二病
Japanese
Etymology
Derived by replacing the 中 (chū, “middle [school]”) with 厨 (chū, “freak; nerd”).
厨二病 (hiragana ちゅうにびょう, rōmaji chūnibyō)
Alternative spelling of 中二病

This usage of 厨 here came from Japanese 'ちゅう' (kanji: 厨 ). Which means &quot;freak or nerd&quot;
&quot;XX 厨&quot; = &quot;XX nerd&quot;  or &quot;XX freak&quot;. Anime and manga fans would be familiar with this term
Other Japanese terms imported to Chinese via manga (mostly circulated among manga readers in written form)

醬(ちゃん).

&quot;XX 醬&quot; = &quot;XX 小妹妹&quot; (Dear little XX)

宅(taku)  came from Otaku (a young person who is obsessed with computers or particular aspects of popular culture to the detriment of their social skills..)

&quot;XX 宅&quot; = &quot;XX obsessed&quot; e.g. &quot;軍事宅&quot; means &quot;a person obsessed with military&quot;