萌个蛋
[méng gè dàn]
Literally it combines two ideas: 'kawaii' from Japan culture referring to something/someone very cute (萌 - moe) with a slang term indicating frustration or anger (个蛋 - meaning nothingness), making this name kind of sarcastic, ironic or humoristic in meaning, usually used when you don't buy into others' cuteness, or mocking someone's overly trying-to-be-cute action.