丢东丢西不丢你忘东忘西不忘你
[diū dōng diū xī bù diū nĭ wàng dōng wàng xī bù wàng nĭ]
This internet nickname means 'losing everything except you and forgetting everything but not you'. It expresses a very deep affection or attachment towards someone, indicating they will never forget or lose this specific person.