小斯文mmm小阳光mmm
[xiăo sī wén mmm xiăo yáng guāng mmm]
A cute self-description, meaning “I'm an elegant and gentle young man/woman who shines brightly and warmly.” Here 'mmm' has no practical significance but serves an affectionate purpose similar to how some people add emoticons in sentences, indicating that this is likely used by a warm and charming person.