嗯哼嗯哼蹦嚓嚓偶耶偶耨偶卖噶
[ng4 hēng ng4 hēng bèng cā cā ŏu yē ŏu nòu ŏu mài gá]
It's composed of meaningless words in Chinese that express joy and excitement. This netname may be used for humor and fun, similar to using onomatopoeic expressions in Western culture.