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1.
A clever word play on my last name.
Sup Knappster?
by The Knappster January 11, 2004
 
2.
A dedicated software/music/movie pirate.
You need at least 150 gigs of pirated crap to be called a knappster these days.
by Vertigo January 08, 2004
 
3.
The term originated from the popular music share program, Napster, but is still used today in homage to the piracy legend.
My grandma's more of a knappster than you'll ever be!
by On the Downlow January 09, 2004
 
4.
Someone who is very senile
Oh my god Knappster, did you forget because you're so senile?
by padkipz October 09, 2010