Definition of: spunk

(spungk) noun
1. Dry wood that burns easily; touchwood; also, a kind of tinder made from a species of fungus; punk.
2. A small fire, spark, or flame; also, a match.
3. Colloq. Quick, fiery temper; mettle; pluck; courage.
—to get one's spunk up To become defiant or angry; also, to take heart; show courage.
—v.i. To take fire; flare up; kindle. [<Irish sponnc tinder <L spongia sponge]