noun
Western affectations; excessively westernized person; wannabe Westerner
Derogatory term for someone overly infatuated with Western culture, often implying superficial imitation. Can refer to the person or their behavior.
彼は留学から帰ってきてすっかり西洋かぶれになった。
He came back from studying abroad completely westernized.
あの西洋かぶれのファッションはちょっとやりすぎだと思う。
I think that wannabe Westerner's fashion is a bit over the top.
Compound of 西洋 (the West) and かぶれ (rash, or figuratively 'being overly influenced'). The figurative use of かぶれ comes from the idea of being 'infected' by something.