A term frequently used to describe an unfriendly, dirty-minded computer science major who thinks he knows more than you because he spends his time hacking your computer from a poorly-lit room.
"How does that awkwardguyknow my dog's name and my bra size?? What a voldface!"
An arrogant person with no soul. Voldfaces believe they know everything and will be quick point out you why you are wrong. Nevermind that you are right.