Throw Away Vote: (Phrase) A vote that is meaningless or irrelevant.

God. Seriously? Paris Hilton brought a camera crew with her to vote? Great. Good job, Paris -- I'm sure your vote for President Rainbow Brite and yes on whatever number Prop supplies free, over-the-counter Valtrex to all the dumb whores in California was very helpful to the democratic process. You should be commended for such selflessness. And when I say "commended" I mean thrown into a piranha-infested river wearing a string bikini made of raw meat.