百毒不侵的人都曾无可救药刀枪不入的人都曾遍体鳞伤
[băi dú bù qīn de rén dōu céng wú kĕ jiù yào dāo qiāng bù rù de rén dōu céng biàn tĭ lín shāng]
This username reflects someone who has become resilient and unphased by external negativity, having been deeply hurt or affected in the past. It suggests a transformation from vulnerability to toughness.