假洋鬼子

jiǎ yáng guǐ zi

(derog.) wannabe foreigner, a Chinese person who apes the ways of foreigners

jiǎ

variant of 假[jia3]

yáng

ocean

guǐ

disembodied spirit; ghost; devil

zi

noun suffix, as in 椅子[yi3 zi5] "chair"