What is the meaning of Spunk?

A spark.

Touchwood; tinder.

Synonym of taper, a thin stick used for transferring flames, especially a sulfur match.

Synonym of match, a thin chemically-treated stick used for creating flames.

Courage; spirit; mettle; determination.

An attractive person; a good-looker.

Semen.

To catch fire; flame up.

To ejaculate.

To waste (money etc.).

Source: wiktionary.org