刀枪不入都曾遍体鳞伤百毒不侵都曾无药可救
[dāo qiāng bù rù dōu céng biàn tĭ lín shāng băi dú bù qīn dōu céng wú yào kĕ jiù]
This nickname expresses resilience following past vulnerabilities. The phrase describes someone having overcome great adversities, both physical and psychological. It means one has experienced severe suffering but now stands strong against further harms.