Top Definition
This word is often defined as the orgasmic noise of chinese or japenese people. Teenage girls most commonly say this when commenting on someone being attractive, or in other words, "hot".
"Omg Jeydon Wale is soooo hot"
"Girl, I know.. OO, MESUMI!!!!!"
作者 clachrislord00d 2009年7月23日

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