玩火线不理我我废你双手
[wán huŏ xiàn bù lĭ wŏ wŏ fèi nĭ shuāng shŏu]
The username means 'If You Ignore Me When I Play Online Shooter Games, Then I Will Break Your Hands.' It is likely a dramatic and playful exaggeration implying competitiveness or a humorous warning in gaming context, especially among friends who play shooter games like CrossFire.