Top Definition
The producer of man sap; the pink piston; the location of a man's second brain, or simply wood.

The more generously endowed may prefer to call it the spunk trunk.
Babe, check out how swollen and purple my spunkstick is!!
by Irritatus Maximus October 04, 2007
A young man who thinks with only his penis. He may be attractive, however lacks mental faculties. (Derogatory)
That young man is nothing but a no good Spunk Stick!
by headcase360 March 28, 2010
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