小三你好剑
[xiăo sān nĭ hăo jiàn]
Breaking down: '小三'(xiao san) refers pejoratively to 'the third party' usually referring to someone interfering with existing relationship maliciously; '你好'('nǐ hǎo') simply saying 'hello'; '剑' means sword. Overall it seems nonsensical or satirically mixed up and could reflect irony/humor depending on context.