While 替え玉 (かえだま, kaedama) usually means "a second helping of ramen noodles", it also has another unique meaning which is completely irrelevant to it: that is, "do something while pretending to be someone else".  The most common phrase is “替え玉受験 (かえだま じゅけん, kaedama juken)”, which means "to take exams on behalf of someone else".Read More