LOL你是我最大的情敌
[lol nĭ shì wŏ zuì dà de qíng dí]
The user is using a mix of English and Chinese in this name. 'LOL' here can stand for 'League of Legends' or 'Laugh Out Loud'. The phrase that follows means 'you are my biggest love rival'. It humorously implies that the person has a special someone who doesn't have feelings for them, jokingly calling 'League of Legends' or laughing at it as their biggest competitor in love.