我要像蟑螂一样打不死
[wŏ yào xiàng zhāng láng yī yàng dă bù sĭ]
This directly translates as 'I will be as invincible as a cockroach.' Often considered pests, cockroaches possess great survivability, which here serves as an analogy expressing toughness, tenacity and resistance against setbacks. The owner of this username probably prides themselves on having such attributes.