Crusty \Crust"y\ (-[y^]), a.

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

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

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 Revised Unabridged Dictionary (1913)