蘑菇菇凉的调皮
[mó gū gū liáng de diào pí]
The term 'Mushroom girl' here represents a person (often young), cute or simple-hearted like a mushroom. And 'mischievous' shows she has a playful and lively personality, fond of jokes and small tricks. It's often used as self-mockery by the netizens to express that although they may be childish at times, they are quite adorable.