CRUSTIEST

CRUSTY

crusty, curmudgeonly, gruff, ill-humored, ill-humoured

(adjective) brusque and surly and forbidding; “crusty remarks”; “a crusty old man”; “his curmudgeonly temper”; “gruff manner”; “a gruff reply”

crusted, encrusted, crusty, crustlike

(adjective) having a hardened crust as a covering

Source: WordNet® 3.1

Adjective

crustiest

superlative form of crusty: most crusty

Source: Wiktionary

CRUSTY

Crust"y (-), a.

1. Having the nature of crust; pertaining to a hard covering; as, a crusty coat; a crusty surface or substance.

2. Etym: [Possibly a corruption of cursty. Cf. Curst, Curstness.]

Definition: Having a hard exterior, or a short, rough manner, though kind at heart; snappish; peevish; surly. Thou crusty batch of nature, what's the news Shak.

Source: Webster’s Unabridged Dictionary 1913 Edition