spunk

Short definition from Wiktionary

Noun

1. 1
   A spark.
2. 2
   Touchwood; tinder.
3. 3
   A piece of tinder, sometimes impregnated with sulphur; a match.
4. 4
   Courage; spirit; mettle; determination.
5. 5
   An attractive person; a good-looker.
6. 6
   Semen.

Verb

1. 1
   To catch fire; flame up.
2. 2
   To ejaculate.
3. 3
   To waste (money etc.).