hard-boiled

hard-boiled (http://definr.com/hard-boiled)

     adj 1: tough and callous by virtue of experience [syn: hard-bitten,
             pugnacious]
     2: used of persons; emotionally hardened; "faced a
        case-hardened judge" [syn: case-hardened, hardened]
     3: (used of eggs) cooked until the yolk is solid