Noun - A person who exhibits such wussy qualities that they in fact create a self-perpetuating, endlessly regenerating wussiness within themselves. If wussiness could be turned into energy, people like this would solve the global fuel crisis forever.
Dude: Hey Tom, wanna get drunk tonight?
Duder: Nah, man, I gotta wake up at 9.
Dude: You're such a wussmachine.