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
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