/'krʌstɪ; `krʌstɪ/
adj (-ier, -iest)
1 having or resembling a crisp crust 有（或似）脆皮的
*crusty French bread 有脆皮的法式面包
* a crusty pizza base 形成脆的硬皮的意大利烤饼的底部.
2 (infml 口) (esp of older people or their behaviour) easily angered; short-tempered （尤指上年纪的人或其行为）动辄发火的, 急性子的
*a crusty old soldier 脾气暴躁的老兵.

adj
bread that is crusty is pleasant to eat because it has a hard crust
　a crusty baguette
informal someone who is crusty is bad-tempered
= grumpy
　a crusty old man
having a thin dry hard layer of something on the surface
　The lake was ringed by crusty salt deposits.