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1.
Noun

To do extremely well.
Ray choumika'd that exam in bio yesterday.
by Puperoni March 16, 2012
 
2.
Noun

Generally a derogatory term for black person. It comes from the combination of "chou" (as in chounikwa, Laquichou, or chouquelle) and the japanese name "Mika", so is a slur for someone having negatively-viewed stereotypical manners of an African American and the prudence of a Japanese teen.
"Yesterday Samantha lectured me about copying Jack's answer to #6, giving me the whole 'my grandparents weren't slaves so you could cheat' story."

"She can be a douche sometimes. 22 and she hasn't even been laid. Such a choumika"
by eu_Flavio January 13, 2012