noun
person who insists everything is better abroad; self-hating Japanese (internet slang)
Derogatory internet slang, especially in football contexts, for a Japanese person who constantly praises foreign countries and criticizes Japan. The 厨 suffix is a derogatory label for an obsessive person.
See also: 厨房
あの掲示板には海外厨が多くて、何でも海外の方が優れていると書き込む。
That forum has a lot of self-hating Japanese who post that everything is better abroad.
サッカーの話になると、すぐに海外厨が出てきてJリーグをけなす。
When the topic turns to football, the 'overseas fanatics' quickly appear and disparage the J.League.
Compound of 海外 (overseas) and 厨, a derogatory internet slang suffix derived from 厨房 (kitchen) used to label obsessive or fanatical people. The exact origin of 厨 as a derogatory suffix is uncertain, but it is widely used in online communities.