The Collaborative International Dictionary
Spunk \Spunk\ (sp[u^][ng]k), n. [Gael. spong, or Ir. sponc, tinder, sponge; cf. AS. sponge a sponge (L. spongia), sp[=o]n a chip. Cf. Sponge, Punk.] [Written also sponk.]
Wood that readily takes fire; touchwood; also, a kind of tinder made from a species of fungus; punk; amadou.
--Sir T. Browne.
An inflammable temper; spirit; mettle; pluck; as, a man of spunk. [Colloq.]
A lawless and dangerous set, men of spunk, and spirit, and power, both of mind and body.
n. (dated form of spunk English)